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The World Trade Centre was a complex of seven buildings in Manhattan in New York, which was destroyed by terrorist attacks on 11 September 2001 in a devastating event known as 9/11. Today the site of this former giant is known as Ground Zero or the September 11 Memorial.
History of the World Trade Centre
The World Trade Centre included the iconic Twin Towers, two 110-storey buildings designed by Minoru Yamasaki in the 1960’s and also known as the North and South Towers. At 1,368 feet tall, the North Tower, which was completed in 1972, surpassed the Empire State Building to become the tallest building in the world followed by the South Tower, although they lost this record to the Chicago Sears Tower later in 1973.
Typically, around 50,000 people worked in the Twin Towers with a further 200,000 people visiting on a daily basis. The World Trade Centre suffered a series of incidents throughout its lifetime, including a fire in the North Tower on 13 February 1975 and a terrorist attack in that tower’s underground garage on 26 February 1993 which killed six people. However, it was the events of 9/11 which are permanently ingrained in the global consciousness.
At 08:46 on 11 September 2001, terrorists crashed commercial American Airlines flight 11 into the North Twin Tower, followed shortly by crashing United Airlines Flight 175 into the South Tower. The impact was enormous. At 9:59, the South Tower collapsed, the North Tower following suit at 10:28. Whilst approximately 15,000 people were safely evacuated, the World Trade Centre attacks claimed almost 3,000 casualties, the worst casualty rate for a terrorist attack in US history.
The impact of the collapse of the towers saw the surrounding area heavily damaged – the clean up operation took nearly a year. The World Trade Centre had been an American icon, and their loss was momentous in every way possible.
The World Trade Centre today (now known as Ground Zero)
On the site of the iconic Twin Towers, which were part of the World Trade Centre complex, there is now a memorial and museum which remember the tragic events of 9/11 and those who lost their lives. It’s an incredibly moving site – you’ll learn about the events which led up to the incident, the unspeakably harrowing hours on the morning of 9/11, and the stories that emerged from it.
There are good temporary exhibitions which look at some of the surrounding context to the event, including the construction of the World Trade Centre and the subsequent ‘War on Terror’ and hunt for Osama Bin Laden. Ladder 3 Firetruck and the so-called Survivors’ Staircase are particularly poignant.
Getting to Ground Zero
The memorial is accessed via Greenwich Street or Dey Street. The nearest subway stations at Cortlandt St and World Trade Center, both of which are a couple of minutes walk away. Any taxi driver in the city will be able to take you here: it’s about a 30 minute ride south of Manhattan.
Never Forget: 10 Facts About the 9/11 Memorial Museum
This museum is one of the deepest buildings of its kind, both physically and metaphorically.
Updated by Paul Keskeys on September 11, 2020
19 years on from the worst terrorist attack in American history, the National September 11 Memorial Museum &mdash which opened in 2013 &mdash remains one of the most visited destinations in New York City, and reopens tomorrow with COVID-19-related safety measures in place. Designed by lead architect Davis Brody Bond with an iconic entry pavilion by Norwegian architecture firm Snøhetta, the building sits in between the two roaring pools of Michael Arad&rsquos 9/11 Memorial. It is part of a larger master plan that includes the 1,776-foot-tall Freedom Tower.
The museum is more than just a collection it incorporates some of the original World Trade Center structures and is one of the deepest buildings of its kind, both physically and metaphorically. Here are 10 facts about the building that are sure to make a lasting impression.
Image courtesy Snøhetta
1. The majority of the building is underground. An entrance ramp leads 70 feet down to a large hall in the footprint of the North Tower, meant to evoke emptiness and absence.
2. Foundation Hall is a huge, towering space. The &ldquoslurry wall,&rdquo a retaining wall that survived the attacks, is incorporated into the design and is meant to represent survival and determination. This space houses the &ldquoLast Column,&rdquo a 36-foot-high piece of steel that was the last to be taken from the site during cleanup in May 2002.
Image courtesy Snøhetta
3. The museum holds 10,000 artifacts, including wrecked emergency vehicles, 911 phone calls and emergency response recordings, pictures of all of the victims and media of the entire event from crash to cleanup. There are also more than 2,000 recordings of firsthand oral history.
4. The entry pavilion is designed to look like the image of a partially collapsed building with a striated facade reminiscent of the Twin Towers.
Image courtesy Snøhetta
5. Interactive tables display information about victims, including photographs, testimonies by family and friends, personal artifacts and the location of individual names on the Memorial plaza.
6. The building cost $700 million to build and requires around $52 million per year to run. Security alone costs an estimated $10 million a year.
7. The museum building is on the former site of the Sphere, a globe sculpture that was located between the twin towers, was damaged in the collapse and is now displayed in nearby Battery Park City.
8. Original plans included a nearby International Freedom Center that was focused on battles for freedom throughout history. It was scrapped as it could potentially criticize American policies.
9. The Memorial and Memorial Museum are just two of many tributes across the country. The Port Authority of New York and New Jersey has distributed more than 1,000 pieces of World Trade Center steel to these locations.
Historical Events on September 11
- Willem III becomes earl of Holland Lithuanian Civil War (1389-1392): the Teutonic Knights begin a five-week siege of Vilnius
Event of Interest
1503 Michelangelo begins sculpting the 12 Apostles for the Cathedral of Florence, over-life-sized marble statues of which only 1 was partly finished, that of St. Matthew
- Santiago, Chile, is destroyed by indigenous warriors, lead by Michimalonko Catholic & Lutheran theology debated in Worms Expulsion order announced against the Moriscos of Valencia beginning of the expulsion of all Spain's Moriscos Thomas Fairfax's New Model Army occupies Bristol -13] Battle at Pilawce: Bohdan Chmielricki's beats John Casimir [OS]
Event of Interest
1649 Massacre of Drogheda, Ireland - Oliver Cromwell kills 3,000 royalists
- Battle of Zenta: forces of Prince Eugen of Savoye defeat the Turks, ending Ottoman control of large parts of Central Europe
Victory in Battle
1708 Great Northern war: Charles XII of Sweden stops his march to conquer Moscow outside Smolensk, marking the turning point in the war
- Battle at Malplaquet during War of the Spanish Succession: English, Austrian and Dutch Great Alliance defeat France French & Spanish troops under Duke of Berwick occupy Barcelona Queen Maria Theresa addresses Hungarian Parliament Battle of Saint Cast: France repels British invasion during the Seven Years' War
Event of Interest
1773 Benjamin Franklin writes "There never was a good war or bad peace"
Victory in Battle
1777 Battle of Brandywine, Pennysylvania Americans lose to the British, Polish soldier Casimir Pulaski saves life of George Washington
Event of Interest
1789 Alexander Hamilton appointed 1st Secretary of the US Treasury
- The French Blue gem (later the Hope Diamond) is stolen with other French crown jewels from Royal storehouse in Paris during Reign of Terror France annexes the Kingdom of Piedmont. Begun on the 6th Sept, Americans defeat British at Battle of Plattsburgh during War of 1812 Battle of Lake Champlain, NY American Navy defeats British 1st Canadian track & field meet held (Caer Howell Grounds)
Event of Interest
1847 1st singing of Stephen Foster's "Susanna" (in Pittsburgh)
- "Swedish Nightingale" Jenny Lind gives 1st US concert Olympia Columbian is 1st newspaper published north of Columbia River 1st electric telegraph used - Merchant's Exchange, San Francisco to Pt Lobos, California Mountain Meadows Massacre, Mormons dressed as Indians murder 120 colonists in Utah British Open Men's Golf, Prestwick GC: Tom Morris Sr retains his title beats Willie Park Sr. by 3 strokes
Event of Interest
1885 Ambrose Bierce finishes as editor of The Wasp magazine
- Mayflower (US) beats Galatea (England) in 7th America's Cup Death of the Argentine politician Domingo Sarmiento, after whom the Latin American Teacher's Day is chosen. British Open Men's Golf, Prestwick GC: John Ball becomes first Englishman and first amateur to win the Open beats Willie Fernie and Archie Simpson by 3 strokes The Jewish Colonization Association is established by Baron Maurice de Hirsch. Bronx Gas & Electric Company opens on Frisby & Tremont Ave Shaku Soen is 1st Zen teacher to visit the West (Chicago) First conference of the World Parliament of Religions is held in Chicago, Indian monk Swani Vivekananda gives influential speech FA Cup stolen in Birmingham
Event of Interest
1897 After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom
Event of Interest
1900 President of Transvaal Paul Kruger crosses border into Mozambique
- The first race at The Milwaukee Mile in West Allis, Wisconsin is held. It is the oldest major speedway in the world.
Event of Interest
1906 Mahatma Gandhi coins the term "Satyagraha" to characterize the Non-Violence movement in South Africa.
1912 Philadelphia second baseman Eddie Collins steals MLB record 6 bases in the Athletics' 9-7 win over Detroit Tigers at Navin Field
1914 W. C. Handy "Father of the Blues" publishes his most famous composition "St Louis Blues"
- Australia invades New Britain, defeating a German contingent there. German troops conquer Kavalla Greece The Quebec Bridge's central span collapses during reconstruction, killing 11 men Boston Red Sox beat Chicago Cubs, 4 games to 2 in 15th World Series US Marines again send troops to Honduras Nahalal, the first moshav in Israel, is settled. British mandate of Palestine begins The Treaty of Kars is ratified in Yerevan, Armenia. One of the Herald Sun of Melbourne, Australia's predecessor papers The Sun News-Pictorial is founded. After a single, Red Sox Howard Ehmke retires next 27 Yanks Bernie Neis, hits the 1,000th Dodger home run ZR-1 (biggest active dirigible) flies over NY's tallest skyscraper, Woolworth Tower 21st Davis Cup: USA beats France in Philadelphia (4-1), for their 7th straight championship Aloha Tower dedicated in Honolulu Spain leaves League of Nation due to Germany joining Yanks' Bob Meusel ties record with 3 sacrifice flies After losing 21 in a row to NY, the Browns win their last meeting, 6-2
1927 Yankees slugger Babe Ruth hits 50th home run during his MLB record 60 HR season in New York's 6-2 loss to St. Louis Browns at Yankee Stadium
Event of Interest
1928 Ty Cobb last hitting appearance, pops out against Yankees
- SF Mayor Rolph inaugurates new pedestrian traffic light system Stromboli volcano (Sicily) throws 2-ton basaltic rocks 2 miles
Murder of Interest
1931 Salvatore Maranzano is murdered by Charles Luciano's hitmen.
- Franciszek Żwirko and Stanisław Wigura, Polish Challenge 1932 winners, are killed in a plane crash when their RWD 6 crashes into the ground during a storm. Antwerps Sportpaleis, the largest indoor arena in Europe opens renovated 2010-13 A's pitcher Horace Lisenbee gives up 26 hits in a game US National Championship Men's Tennis, Forest Hills, NY: American Don Budge wins first of 2 straight US titles beats Gottfried von Cramm of Germany 6-1, 7-9, 6-1, 3-6, 6-1 US National Championship Women's Tennis, Forest Hills, NY: Anita Lizana of Chile becomes first Latin American to win a major beats Jadwiga Jędrzejowska of Poland 6-4, 6-2 Battle of Kutno-pocket: Germans advance to Warsaw British submarine Triton torpedoes British submarine Oxley Iraq and Saudi Arabia declare war on Nazi Germany -12] Buckingham Palace damaged by German bombs 54th US Postmaster General: Frank C Walker of Pa takes office Anton Mussert establishes Dutch SS
Event of Interest
1940 Hitler begins operation Seelöwe (Sealion - aborted invasion England)
NYC First Responders on 9/11: Photos
The 9/11 attacks not only became the single deadliest terrorist attack in human history, they were also the deadliest incident ever for firefighters, as well as for law enforcement officers in the United States.
READ MORE: How 9/11 Became the Deadliest Day in History for U.S.ਏirefighters
3. Anti-Muslim Violence Grew
A New York City police officer stands guard by Arab community merchants to protect against hostility in the wake of 9/11. Photographed October 5, 2001.
Mark Peterson/Corbis/Getty Images
Just four days after the 9/11 attacks, a gunman in Mesa, Arizona went on a shooting rampage. First, he shot and killed Balbir Singh Sodhi, a gas station owner of Indian descent. Sodhi was Sikh, so he wore a turban. The gunman assumed he was Muslim. Minutes later, the gunman shot at another gas station clerk of Lebanese descent, but missed, and then shot through the windows of an Afghan-American family.
Even as politicians and law enforcement repeatedly stated that Islam was a peaceful religion whose true teachings had been twisted by terrorist extremists, many people in America and around the world still equated the 9/11 attacks with Islam and sought vengeance on anyone that even looked Muslim.
In the year 2000, there were only 12 anti-Muslim assaults reported to the FBI. In 2001, that number skyrocketed to 93. As civil liberties organizations criticized the TSA and law enforcement for the racial profiling of Arab and Muslim men, hate crimes against Muslims persisted. Statistics from the FBI showed there were 91 reported aggravated or simple assaults motivated by anti-Muslim bias in 2015 and in 2016, that figure surpassed 2001 numbers, reaching 127.
The origins of al-Qaeda can be traced to 1979 when the Soviet Union invaded Afghanistan. Osama bin Laden travelled to Afghanistan and helped to organize Arab mujahideen to resist the Soviets.  Under the guidance of Ayman al-Zawahiri, bin Laden became more radical.  In 1996, bin Laden issued his first fatwā, calling for American soldiers to leave Saudi Arabia. 
In a second fatwā in 1998, bin Laden outlined his objections to American foreign policy with respect to Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.  Bin Laden used Islamic texts to exhort Muslims to attack Americans until the stated grievances were reversed. Muslim legal scholars "have throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries", according to bin Laden.  
Osama bin Laden
Bin Laden orchestrated the attacks and initially denied involvement but later recanted his false statements.    Al Jazeera broadcast a statement by bin Laden on September 16, 2001, stating, "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation."  In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden is seen talking to Khaled al-Harbi and admits foreknowledge of the attacks.  On December 27, 2001, a second bin Laden video was released. In the video, he said:
It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. . It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. . We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim umma (nation) has occurred
but he stopped short of admitting responsibility for the attacks. 
Shortly before the U.S. presidential election in 2004, bin Laden used a taped statement to publicly acknowledge al-Qaeda's involvement in the attacks on the United States. He admitted his direct link to the attacks and said they were carried out because .
we are free . and want to regain freedom for our nation. As you undermine our security, we undermine yours. 
Bin Laden said he had personally directed his followers to attack the World Trade Center and the Pentagon.   Another video obtained by Al Jazeera in September 2006 shows bin Laden with Ramzi bin al-Shibh, as well as two hijackers, Hamza al-Ghamdi and Wail al-Shehri, as they make preparations for the attacks.  The U.S. never formally indicted bin Laden for the 9/11 attacks, but he was on the FBI's Most Wanted List for the bombings of the U.S. Embassies in Dar es Salaam, Tanzania, and Nairobi, Kenya.   After a 10-year manhunt, U.S. President Barack Obama announced that bin Laden was killed by American special forces in his compound in Abbottabad, Pakistan, on May 1, 2011. 
Khalid Sheikh Mohammed
Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002, Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh.    The 2004 9/11 Commission Report determined that the animosity towards the United States felt by Mohammed, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".  Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.  
Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay where he was interrogated and tortured with methods including waterboarding.   During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.  
A letter presented by the lawyers of Khaled Sheikh Mohammed in the U.S. District Court, Manhattan on July 26, 2019 indicated that he was interested in testifying about Saudi Arabia’s role in the 9/11 attacks and helping the victims and families of the victims of 9/11 in exchange for the United States not seeking the death penalty against him. James Kreindler, one of the lawyers for the victims, raised question over the usefulness of Mohammed. 
Other al-Qaeda members
In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden, Khalid Sheikh Mohammed, Ramzi bin al-Shibh, Abu Turab al-Urduni, and Mohammed Atef.  To date, only peripheral figures have been tried or convicted for the attacks.
On September 26, 2005, the Spanish high court sentenced Abu Dahdah to 27 years in prison for conspiracy on the 9/11 attacks and being a member of the terrorist organization al-Qaeda. At the same time, another 17 al-Qaeda members were sentenced to penalties of between six and eleven years.  On February 16, 2006, the Spanish Supreme Court reduced the Abu Dahdah penalty to twelve years because it considered that his participation in the conspiracy was not proven. 
Also in 2006 Moussaoui, who some originally suspected might have been the assigned twentieth hijacker, was convicted for the lesser role of conspiracy to commit acts of terrorism and air piracy. He was sentenced to life in prison without parole in the United States.   Mounir el-Motassadeq, an associate of the Hamburg-based hijackers, served 15 years in Germany for his role in helping the hijackers prepare for the attacks. He was released in October 2018, and deported to Morocco. 
The Hamburg cell in Germany included radical Islamists who eventually came to be key operatives in the 9/11 attacks.  Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, Ramzi bin al-Shibh, and Said Bahaji were all members of al-Qaeda's Hamburg cell. 
Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others, calling for the killing of Americans,  are seen by investigators as evidence of his motivation.  In bin Laden's November 2002 "Letter to America", he explicitly stated that al-Qaeda's motives for their attacks include:
- support for the "attacks against Muslims" in Somalia
- support of Philippines against Muslims in the Moro conflict
- support for Israeli "aggression" against Muslims in Lebanon
- support of Russian "atrocities against Muslims" in Chechnya
- pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
- support of Indian "oppression against Muslims" in Kashmir
- the presence of U.S. troops in Saudi Arabia
- the sanctions against Iraq
After the attacks, bin Laden and al-Zawahiri released additional videotapes and audio recordings, some of which repeated those reasons for the attacks. Two particularly important publications were bin Laden's 2002 "Letter to America",  and a 2004 videotape by bin Laden. 
Bin Laden interpreted Muhammad as having banned the "permanent presence of infidels in Arabia".  In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, al-Qaeda wrote, "for over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbors, and turning its bases in the Peninsula into a spearhead through which to fight the neighboring Muslim peoples." 
In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.  One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, al-Qaeda likely would not have been able to get people to commit to suicide missions. 
In the 1998 fatwā, al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade"  among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims."  The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim."  
In 2004, Bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982, when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War.   Some analysts, including Mearsheimer and Walt, also claimed that U.S. support of Israel was one motive for the attacks.   In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letter expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.  
Other motives have been suggested in addition to those stated by bin Laden and al-Qaeda. Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world – this discrepancy was rendered especially visible by the globalization trend   and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support al-Qaeda. Similarly, others have argued that 9/11 was a strategic move with the objective of provoking America into a war that would incite a pan-Islamic revolution.  
The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996.  At that time, bin Laden and al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.  The 1998 African embassy bombings and bin Laden's February 1998 fatwā marked a turning point of al-Qaeda's terrorist operation,  as bin Laden became intent on attacking the United States.
In late 1998 or early 1999, bin Laden gave approval for Mohammed to go forward with organizing the plot.  Mohammed, bin Laden, and bin Laden's deputy Mohammed Atef held a series of meetings in early 1999.  Atef provided operational support, including target selections and helping arrange travel for the hijackers.  Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time.  
Bin Laden provided leadership and financial support and was involved in selecting participants.  He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California, but both spoke little English, performed poorly in flying lessons, and eventually served as secondary ("muscle") hijackers.  
In late 1999, a group of men from Hamburg, Germany arrived in Afghanistan the group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.  Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.  New recruits were routinely screened for special skills and al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.  Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing. 
Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.  : 6–7 They soon left for Arizona, where Hanjour took refresher training.  : 7 Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.  : 6 Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa.  : 4, 14 Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.  : 16 The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation.  : 6
In the spring of 2001, the secondary hijackers began arriving in the United States.  In July 2001, Atta met with bin al-Shibh in Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.  Some of the hijackers received passports from corrupt Saudi officials who were family members, or used fraudulent passports to gain entry. 
There is some idea that 9/11 was selected by the hijackers as the date of the attack because of its resemblance to 9-1-1, the phone number to report emergencies in the U.S. However, Lawrence Wright wrote that the hijackers chose it because September 11, 1683 is when the King of Poland began the battle that turned back the Muslim armies from the Ottoman Empire that were attempting to capture Vienna. For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence. 
In late 1999, al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar, telling him to meet him in Kuala Lumpur, Malaysia Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi). While the agency feared "Something nefarious might be afoot", it took no further action. The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as al-Qaeda members, and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000 meeting of the two al-Qaeda members, and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI." 
By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel.  In early July, Clarke put domestic agencies on "full alert", telling them, "Something really spectacular is going to happen here. soon." He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta".   Clarke would later write: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. Somewhere in FBI, there was information that strange things had been going on at flight schools in the United States . They had specific information about individual terrorists from which one could have deduced what was about to happen. None of that information got to me or the White House." 
On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded. 
The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. She was not told of the participant's presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material on the meeting with criminal investigators. When shown the photos, the FBI were refused more details on their significance, and they were not given Mihdhar's date of birth nor passport number.  In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in the search for the duo, which hindered their efforts. 
Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and to FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.  In July, Jordan alerted the U.S. that al-Qaeda was planning an attack on the U.S. "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved aeroplanes. 
On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled "Bin Ladin Determined to Strike in U.S." The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks". 
In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". The FBI found that Moussaoui was a radical who had traveled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause. 
The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones.  Testifying before the 9/11 Commission in April 2004, then-Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents".  Clarke also wrote: "There were failures in the organization's failures to get information to the right place at the right time." 
Early on the morning of September 11, 2001, 19 hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California (three of them headed to LAX in Los Angeles and one to SFO in San Francisco) after takeoffs from Logan International Airport in Boston, Massachusetts Newark Liberty International Airport in Newark, New Jersey and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia.  Large planes with long flights were selected for hijacking because they would be full of fuel. 
- : a Boeing 767 aircraft, departed Logan Airport at 7:59 a.m. en route to Los Angeles with a crew of 11 and 76 passengers, not including five hijackers. The hijackers flew the plane into the northern facade of the North Tower of the World Trade Center in New York City at 8:46 a.m. : a Boeing 767 aircraft, departed Logan Airport at 8:14 a.m. en route to Los Angeles with a crew of nine and 51 passengers, not including five hijackers. The hijackers flew the plane into the southern facade of the South Tower of the World Trade Center in New York City at 9:03 a.m. : a Boeing 757 aircraft, departed Washington Dulles International Airport at 8:20 a.m. en route to Los Angeles with a crew of six and 53 passengers, not including five hijackers. The hijackers flew the plane into the western facade of the Pentagon in Arlington County, Virginia, at 9:37 a.m. : a Boeing 757 aircraft, departed Newark International Airport at 8:42 a.m. en route to San Francisco, with a crew of seven and 33 passengers, not including four hijackers. As passengers attempted to subdue the hijackers, the aircraft crashed into a field in Stonycreek Township near Shanksville, Pennsylvania, at 10:03 a.m.
Media coverage was extensive during the attacks and aftermath, beginning moments after the first crash into the World Trade Center. 
|Operator||Flight number||Aircraft type||Time of departure*||Time of crash*||Departed from||En route to||Crash site||Fatalities|
|Crew||Passengers †||Ground fatalities §||Hijackers||Total ‡|
|American Airlines||11||Boeing 767-223ER||7:59 a.m.||8:46 a.m.||Logan International Airport||Los Angeles International Airport||North Tower of the World Trade Center||11||76||2,606||5||2,763|
|United Airlines||175||Boeing 767-222||8:14 a.m.||9:03 a.m.||Logan International Airport||Los Angeles International Airport||South Tower of the World Trade Center||9||51||5|
|American Airlines||77||Boeing 757-223||8:20 a.m.||9:37 a.m.||Washington Dulles International Airport||Los Angeles International Airport||West wall of Pentagon||6||53||125||5||189|
|United Airlines||93||Boeing 757-222||8:42 a.m.||10:03 a.m.||Newark Int'l Airport||San Francisco International Airport||Field in Stonycreek Township near Shanksville||7||33||0||4||44|
* Eastern Daylight Time (UTC-04:00)
† Excluding hijackers
§ Including emergency workers
‡ Including hijackers
The four crashes
At 8:46 a.m., five hijackers crashed American Airlines Flight 11 into the northern facade of the World Trade Center's North Tower (1 WTC). At 9:03, another five hijackers crashed United Airlines Flight 175 into the southern facade of the South Tower (2 WTC).   Five hijackers flew American Airlines Flight 77 into the Pentagon at 9:37.  A fourth flight, United Airlines Flight 93, crashed near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 after the passengers fought the four hijackers. Flight 93's target is believed to have been either the Capitol or the White House.  Flight 93's cockpit voice recorder revealed crew and passengers tried to seize control of the plane from the hijackers after learning through phone calls that Flights 11, 77, and 175 had been crashed into buildings that morning.  Once it became evident that the passengers might gain control, the hijackers rolled the plane and intentionally crashed it.  
Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane they used mace, tear gas, or pepper spray to overcome attendants and some people aboard had been stabbed.  Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.   According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades, which were not forbidden to passengers at the time, but were not found among the possessions left behind by the hijackers.   A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake. 
Three buildings in the World Trade Center collapsed due to fire-induced structural failure.  The South Tower collapsed at 9:59 a.m. having burned for 56 minutes in a fire caused by the impact of United Airlines Flight 175 and the explosion of its fuel.  The North Tower collapsed at 10:28 after burning for 102 minutes.  When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging it and starting fires. These fires burned for hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m.   The west side of the Pentagon sustained significant damage.
At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.  All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days.  The attacks created widespread confusion among news organizations and air traffic controllers. Among the unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent said a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.  Another jet (Delta Air Lines Flight 1989) was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio. 
In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House.  During the planning stage of the attacks, Mohamed Atta, the hijacker and pilot of Flight 11, thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).  Mohammed said al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".  Final decisions on targets, according to Mohammed, were left in the hands of the pilots.  If any pilot could not reach his intended target, he was to crash the plane. 
The attacks are the deadliest terrorist attacks in world history,  causing the deaths of 2,996 people (including the hijackers) and injuring more than 6,000 others.  The death toll included 265 on the four planes (from which there were no survivors), 2,606 in the World Trade Center and in the surrounding area, and 125 at the Pentagon.   Most who died were civilian the rest include 340 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists.   After New York, New Jersey lost the most state citizens, with the city of Hoboken having lost the most New Jersey citizens.  More than ninety countries lost citizens in the attacks  for example, the 67 Britons who died were more than in any other terrorist attack anywhere as of October 2002 [update] . 
In Arlington County, Virginia, 125 Pentagon workers died when Flight 77 crashed into the western side of the building. 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. The Army lost 47 civilian employees, six civilian contractors, and 22 soldiers, while the Navy lost six civilian employees, three civilian contractors, and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees died, and one Office of the Secretary of Defense (OSD) contractor.    Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon. 
In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact.  In the North Tower, 1,355 people at or above the point of impact were trapped and died of smoke inhalation, fell or jumped from the tower to escape the smoke and flames, or were killed in the building's collapse. The destruction of all three staircases in the tower when Flight 11 hit made it impossible for anyone above the impact zone to escape. 107 people below the point of impact died. 
In the South Tower, one stairwell, Stairwell A, was left intact after Flight 175 hit, allowing 14 people located on the floors of impact (including one man who saw the plane coming at him) and four more from the floors above to escape. New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.  In total 630 people died in that tower, fewer than half the number killed in the North Tower.  Casualties in the South Tower were significantly reduced because some occupants decided to start evacuating as soon as the North Tower was struck.  The failure to evacuate the South Tower fully after the first jet crash into the North Tower was described by USA Today as "one of the day's great tragedies". 
At least 200 people fell or jumped to their deaths from the burning towers (as exemplified in the photograph The Falling Man), landing on the streets and rooftops of adjacent buildings hundreds of feet below.  Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked.  No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke, and intense heat prevented helicopters from approaching.  A total of 411 emergency workers died as they tried to rescue people and fight fires. The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics.  The New York City Police Department (NYPD) lost 23 officers.  The Port Authority Police Department (PAPD) lost 37 officers.  Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services units were killed. 
Cantor Fitzgerald L.P., an investment bank on the 101st–105th floors of the North Tower, lost 658 employees, considerably more than any other employer.  Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,   and 175 employees of Aon Corporation were also killed.  The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m.  [ page needed ]  Most people below the impact zone safely evacuated the buildings. 
Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.  The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".  Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building. In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.    The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum. In July 2011, a team of scientists at the Office of Chief Medical Examiner was still trying to identify remains, in the hope that improved technology will allow them to identify other victims.  On August 7, 2017, the 1,641st victim was identified as a result of newly available DNA technology,  and a 1,642nd on July 26, 2018.  Three more victims were identified in 2019. A further 1,108 victims are yet to be identified. 
Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.  The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.   The two buildings of the World Financial Center also suffered damage.  The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks. 
The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower, and was deconstructed.   The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage in the attacks, and was reopened in 2012.  Other neighboring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.  World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.  Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.  
The PATH train system's World Trade Center station was located under the complex. As a result, the entire station was demolished completely when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey were flooded with water.  The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015.   The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.  The latter station was rebuilt and reopened to the public on September 8, 2018. 
The Pentagon was severely damaged by the impact of American Airlines Flight 77 and ensuing fires, causing one section of the building to collapse.  As the airplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.   The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.  Debris from the tail section penetrated furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.  
The New York City Fire Department deployed 200 units (half of the department) to the World Trade Center. Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.    The New York City Police Department sent Emergency Service Units and other police personnel and deployed its aviation unit. Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.   As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for its personnel to evacuate the towers most NYPD officers were able to safely evacuate before the buildings collapsed.   With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.
After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.  Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002. 
The aftermath of the 9/11 attack resulted in immediate responses to the event, including domestic reactions, hate crimes, Muslim American responses to the event, international responses to the attack, and military responses to the events. An extensive compensation program was quickly established by Congress in the aftermath to compensate the victims and families of victims of the 9/11 attack as well.  
At 8:32 a.m. FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53.  Because of slow and confused communication from FAA officials, NORAD had nine minutes' notice, and no notice about any of the other flights before they crashed.  After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30.  At 10:20, Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.     Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment. 
For the first time in U.S. history, the emergency preparedness plan called Security Control of Air Traffic and Air Navigation Aids (SCATANA) was invoked,  thus stranding tens of thousands of passengers across the world.  Ben Sliney, in his first day as the National Operations Manager of the FAA,  ordered that American airspace would be closed to all international flights, causing about five hundred flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers. 
The 9/11 attacks had immediate effects on the American people.  Police and rescue workers from around the country took a leave of absence from their jobs and traveled to New York City to help recover bodies from the twisted remnants of the Twin Towers.  Blood donations across the U.S. surged in the weeks after 9/11.  
The deaths of adults in the attacks resulted in over 3,000 children losing a parent.  Subsequent studies documented children's reactions to these actual losses and to feared losses of life, the protective environment in the aftermath of the attacks, and effects on surviving caregivers.   
Following the attacks, President George W. Bush's approval rating soared to 90%.  On September 20, 2001, he addressed the nation and a joint session of the United States Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role won him high praise in New York and nationally. 
Many relief funds were immediately set up to assist victims of the attacks, with the task of providing financial assistance to the survivors of the attacks and to the families of victims. By the deadline for victim's compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed. 
Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.  Congress was not told that the United States had been under a continuity of government status until February 2002. 
In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.  Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade the privacy of citizens and that it eliminates judicial oversight of law enforcement and domestic intelligence.    In an effort to effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized since it permitted the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".  In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world. 
Shortly after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect."  Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.    Sikhs were also targeted because Sikh males usually wear turbans, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on people, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, was fatally shot on September 15, 2001, in Mesa, Arizona.  Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks. 
According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.  A report by the South Asian American advocacy group known as South Asian Americans Leading Together, documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.  
Muslim American response
Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".  These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.   
The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.  Leaders in most Middle Eastern countries, and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that, "the American cowboys are reaping the fruit of their crimes against humanity".  The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause.   Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem.   Footage by CNN [ vague ] and other news outlets were suggested to be from 1991, which was later proven to be a false accusation, resulting in a statement being issued by CNN.   As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims. 
United Nations Security Council Resolution 1368 condemned the attacks, and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.  Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of al-Qaeda ties.   Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.  
British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States.  A few days later, Blair flew to Washington, D.C. to affirm British solidarity with the United States. In a speech to Congress, nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain."  Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action he held 54 meetings with world leaders and traveled more than 40,000 miles (60,000 km). 
In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of a military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001. Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of al-Qaeda.  Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected al-Qaeda members.  
The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.   
On September 25, 2001, Iran's fifth president, Mohammad Khatami meeting British Foreign Secretary, Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11." He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians instead felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists."  According to Radio Farda's website, when the attacks' news was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests protecting office in Iran), to express their sympathy and some of them lit candles as a symbol of mourning. This piece of news at Radio Farda's website also states that in 2011, on the anniversary of the attacks, United States Department of State, published a post at its blog, in which the Department thanked Iranian people for their sympathy and stated that they would never forget Iranian people's kindness on those harsh days.  After the attacks, both the President   and the Supreme Leader of Iran, condemned the attacks. The BBC and Time magazine published reports on holding candlelit vigils for the victims by Iranian citizens at their websites.   According to Politico Magazine, following the attacks, Sayyed Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily. 
In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time". 
In September 2001, shortly after the attacks, Greek soccer fans burned an Israeli flag and unsuccessfully tried to burn an American flag. Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks. 
At 2:40 p.m. in the afternoon of September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether good enough hit S.H. [Saddam Hussein] at same time. Not only UBL" [Osama bin Laden].  Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not."   In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to 9/11.  Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".  At the time, as many as seven in ten Americans believed the Iraqi president played a role in the 9/11 attacks.  Three years later, Bush conceded that he had not. 
The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind.  Australian Prime Minister John Howard who was in Washington, D.C. during the attacks invoked Article IV of the ANZUS treaty.  The Bush administration announced a War on Terror, with the stated goals of bringing bin Laden and al-Qaeda to justice and preventing the emergence of other terrorist networks.  These goals would be accomplished by imposing economic and military sanctions against states harboring terrorists, and increasing global surveillance and intelligence sharing. 
On September 14, 2001, the U.S. Congress passed the Authorization for Use of Military Force Against Terrorists. It is still in effect, and it grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks, or who harbored said persons or groups. 
On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces.  This eventually led to the overthrow of the Taliban rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces.  Conflict in Afghanistan between the Taliban insurgency and the Afghan forces backed by NATO Resolute Support Mission is ongoing. The Philippines and Indonesia, among other nations with their own internal conflicts with Islamic terrorism, also increased their military readiness.  
The military forces of the United States of America and the Islamic Republic of Iran cooperated with each other to overthrow the Taliban regime which had had conflicts with the government of Iran.  Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat.   
Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants, including known carcinogens, were spread across Lower Manhattan due to the collapse of the Twin Towers.   Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero.   The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002. 
Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown.  Several deaths have been linked to the toxic dust, and the victims' names were included in the World Trade Center memorial.  Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.  There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development. A notable children's environmental health center is currently [ when? ] analyzing the children whose mothers were pregnant during the WTC collapse, and were living or working nearby.  A study of rescue workers released in April 2010 found that all those studied had impaired lung functions, and that 30–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack. 
Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.  Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the aftermath of the attacks, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.  Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area. 
On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.   The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program. 
The attacks had a significant economic impact on United States and world markets.  The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.  By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history.  In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week. 
In New York City, about 430,000 job-months and $2.8 billion in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.  The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs. 
Also hurt were small businesses in Lower Manhattan near the World Trade Center, 18,000 of which were destroyed or displaced, resulting in lost jobs and their consequent wages. Assistance was provided by Small Business Administration loans, federal government Community Development Block Grants, and Economic Injury Disaster Loans.  Some 31,900,000 square feet (2,960,000 m 2 ) of Lower Manhattan office space was damaged or destroyed.  Many wondered whether these jobs would return, and if the damaged tax base would recover.  Studies of the economic effects of 9/11 show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.  
North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry. 
The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq,  as well as additional homeland security spending, totaling at least $5 trillion. 
The impact of 9/11 extends beyond geopolitics into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of flags.  The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, television, music, and literature. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.  9/11 conspiracy theories have become social phenomena, despite lack of support from expert scientists, engineers, and historians.  9/11 has also had a major impact on the religious faith of many individuals for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief others started to question their faith or lost it entirely, because they could not reconcile it with their view of religion.  
The culture of America succeeding the attacks is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks that includes most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.  Anti-Muslim hate crimes rose nearly ten-fold in 2001, and have subsequently remained "roughly five times higher than the pre-9/11 rate." 
Government policies toward terrorism
As a result of the attacks, many governments across the world passed legislation to combat terrorism.  In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.  Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law.  The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005.   New Zealand enacted the Terrorism Suppression Act 2002. 
In the United States, the Department of Homeland Security was created by the Homeland Security Act of 2002 to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge, to monitor telephone communications, e-mail, and Internet use by terror suspects, and to prosecute suspected terrorists without time restrictions. The FAA ordered that airplane cockpits be reinforced to prevent terrorists gaining control of planes, and assigned sky marshals to flights. Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.  After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about collection of American call records by the NSA and the PRISM program (see Global surveillance disclosures (2013–present)), Representative Jim Sensenbrenner, Republican of Wisconsin, who introduced the Patriot Act in 2001, said that the National Security Agency overstepped its bounds.  
Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in the history of the United States. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.  The FBI concluded that there was "clear and irrefutable" evidence linking al-Qaeda and bin Laden to the attacks. 
The FBI was quickly able to identify the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments, and al-Qaeda connections. "It had all these Arab-language [sic] papers that amounted to the Rosetta stone of the investigation", said one FBI agent.  Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.   On September 27, 2001, they released photos of all 19 hijackers, along with information about possible nationalities and aliases.  Fifteen of the men were from Saudi Arabia, two from the United Arab Emirates, one from Egypt, and one from Lebanon. 
By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden.  Two of the hijackers were known to have travelled with a bin Laden associate to Malaysia in 2000  and hijacker Mohammed Atta had previously gone to Afghanistan.  He and others were part of a terrorist cell in Hamburg.  One of the members of the Hamburg cell was discovered to have been in communication with Khalid Sheik Mohammed who was identified as a member of al-Qaeda. 
Authorities in the United States and United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicate that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation." These conversations did not specifically mention the World Trade Center or Pentagon, or other specifics. 
The FBI did not record the 2,977 deaths from the attacks in their annual violent crime index for 2001. In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses."  New York City also did not include the deaths in their annual crime statistics for 2001. 
In 2004, John L. Helgerson, the Inspector General of the Central Intelligence Agency (CIA), conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism.  According to Philip Giraldi in The American Conservative, Helgerson criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI.  [ better source needed ]
In May 2007, senators from both major U.S. political parties drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11."  The report was released in 2009 by President Barack Obama. 
In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community.  Their 832-page report released in December 2002  detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, in order to disrupt the plots.  The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.  Nevertheless, the Bush administration demanded 28 related pages remain classified.  In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States."  September 11 victim families were frustrated by the unanswered questions and redacted material from the Congressional inquiry and demanded an independent commission.  September 11 victim families,  members of congress  and the Saudi Arabian government are still seeking release of the documents.   In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks. 
In September 2016, the Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.   
The National Commission on Terrorist Attacks Upon the United States (9/11 Commission), chaired by Thomas Kean and Lee H. Hamilton, was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.  On July 22, 2004, the Commission issued the 9/11 Commission Report. The report detailed the events of 9/11, found the attacks were carried out by members of al-Qaeda, and examined how security and intelligence agencies were inadequately coordinated to prevent the attacks. Formed from an independent bipartisan group of mostly former Senators, Representatives, and Governors, the commissioners explained, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".  The Commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented. 
National Institute of Standards and Technology
The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.  The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008. 
NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that, had this not occurred, the towers likely would have remained standing.  A 2007 study of the north tower's collapse published by researchers of Purdue University determined that, since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.  
The director of the original investigation stated that "the towers really did amazingly well. The terrorist aircraft didn't bring the buildings down it was the fire which followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand."  The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward. With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.  NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down". 
Alleged Saudi role
In July 2016, the Obama administration released a document, compiled by US investigators Dana Lesemann and Michael Jacobson, known as "File 17",  which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C.,  which connects Saudi Arabia to the hijackers.  
On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again." 
The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.  The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.  The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting 1 WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.  One WTC finished construction and opened on November 3, 2014.  
On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood.  4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property.  3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed.  On the 16th anniversary of the 9/11 attacks, a writer for Curbed New York said that although "there is a World Trade Center again", it was not finished, as 2 and 5 WTC did not have definite completion dates, among other things. 
Port Authority of New York and New Jersey Executive Director from 2008-2011, Christopher O. Ward, is a survivor of the attacks and is credited with getting the construction of the 9/11 site back on track. 
In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, walls of subway stations. Everything reminded me of a huge funeral, people quiet and sad, but also very nice. Before, New York gave me a cold feeling now people were reaching out to help each other." 
One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.  In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.  The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.  The memorial was completed on September 11, 2011  a museum also opened on site on May 21, 2014. 
The Sphere by the German sculptor Fritz Koenig is the world's largest bronze sculpture of modern times and stood between the twin towers on the Austin J. Tobin Plaza of the World Trade Center in New York City from 1971 until the terrorist attacks on September 11, 2001. The artefact, weighing more than 20 tons, was the only remaining work of art to be recovered largely intact from the ruins of the collapsed twin towers after the attacks. Since then, the work of art known in the USA as The Sphere has been transformed into an important symbolic monument of 9/11 commemoration. After being dismantled and stored near a hangar at John F. Kennedy International Airport, the sculpture was the subject of the 2001 documentary Koenig's Sphere by filmmaker Percy Adlon. On August 16, 2017, the The Sphere newly inaugurated at the Liberty Park close to the new World Trade Center arial and the 9/11 Memorial. 
In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.   It consists of a landscaped park with 184 benches facing the Pentagon.  When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building. 
In Shanksville, a concrete and glass visitor center was opened on September 10, 2015,  situated on a hill overlooking the crash site and the white marble Wall of Names.  An observation platform at the visitor center and the white marble wall are both aligned beneath the path of Flight 93.   A temporary memorial is located 500 yards (457 m) from the crash site.  New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.  It was installed outside the firehouse on August 25, 2008.  Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families, and by many other organizations and private figures. 
On every anniversary, in New York City, the names of the victims who died there are read out against a background of somber music. The President of the United States attends a memorial service at the Pentagon,  and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the President's spouse.
The September 11 attacks were precipitated in large part because Osama bin Laden, the leader of the militant Islamic organization al-Qaeda, held naive beliefs about the United States in the run-up to the attacks. Abu Walid al-Masri, an Egyptian who was a bin Laden associate in Afghanistan in the 1980s and ’90s, explained that, in the years prior to the attacks, bin Laden became increasingly convinced that America was weak. “He believed that the United States was much weaker than some of those around him thought,” Masri remembered, and “as evidence he referred to what happened to the United States in Beirut when the bombing of the Marines base led them to flee from Lebanon,” referring to the destruction of the marine barracks there in 1983 (see 1983 Beirut barracks bombings), which killed 241 American servicemen. Bin Laden believed that the United States was a “paper tiger,” a belief shaped not just by America’s departure from Lebanon following the marine barracks bombing but also by the withdrawal of American forces from Somalia in 1993, following the deaths of 18 U.S. servicemen in Mogadishu, and the American pullout from Vietnam in the 1970s.
The key operational planner of the September 11 attacks was Khalid Sheikh Mohammed (often referred to simply as “KSM” in the later 9/11 Commission Report and in the media), who had spent his youth in Kuwait. Khalid Sheikh Mohammed became active in the Muslim Brotherhood, which he joined at age 16, and then he went to the United States to attend college, receiving a degree from North Carolina Agricultural and Technical State University in 1986. Afterward he traveled to Pakistan and then Afghanistan to wage jihad against the Soviet Union, which had launched an invasion against Afghanistan in 1979.
According to Yosri Fouda, a journalist at the Arabic-language cable television channel Al Jazeera who interviewed him in 2002, Khalid Sheikh Mohammed planned to blow up some dozen American planes in Asia during the mid-1990s, a plot (known as “ Bojinka”) that failed, “but the dream of Khalid Sheikh Mohammed never faded. And I think by putting his hand in the hands of bin Laden, he realized that now he stood a chance of bringing about his long awaited dream.”
In 1996 Khalid Sheikh Mohammed met bin Laden in Tora Bora, Afghanistan. The 9-11 Commission (formally the National Commission on Terrorist Attacks Upon the United States), set up in 2002 by Pres. George W. Bush and the U.S. Congress to investigate the attacks of 2001, explained that it was then that Khalid Sheikh Mohammed “presented a proposal for an operation that would involve training pilots who would crash planes into buildings in the United States.” Khalid Sheikh Mohammed dreamed up the tactical innovation of using hijacked planes to attack the United States, al-Qaeda provided the personnel, money, and logistical support to execute the operation, and bin Laden wove the attacks on New York and Washington into a larger strategic framework of attacking the “far enemy”—the United States—in order to bring about regime change across the Middle East.
The September 11 plot demonstrated that al-Qaeda was an organization of global reach. The plot played out across the globe with planning meetings in Malaysia, operatives taking flight lessons in the United States, coordination by plot leaders based in Hamburg, Germany, money transfers from Dubai, and recruitment of suicide operatives from countries around the Middle East—all activities that were ultimately overseen by al-Qaeda’s leaders in Afghanistan.
Key parts of the September 11 plot took shape in Hamburg. Four of the key pilots and planners in the “Hamburg cell” who would take operational control of the September 11 attacks, including the lead hijacker Mohammed Atta, had a chance meeting on a train in Germany in 1999 with an Islamist militant who struck up a conversation with them about fighting jihad in the Russian republic of Chechnya. The militant put the Hamburg cell in touch with an al-Qaeda operative living in Germany who explained that it was difficult to get to Chechnya at that time because many travelers were being detained in Georgia. He recommended they go to Afghanistan instead.
Although Afghanistan was critical to the rise of al-Qaeda, it was the experience that some of the plotters acquired in the West that made them simultaneously more zealous and better equipped to carry out the attacks. Three of the four plotters who would pilot the hijacked planes on September 11 and one of the key planners, Ramzi Binalshibh, became more radical while living in Hamburg. Some combination of perceived or real discrimination, alienation, and homesickness seems to have turned them all in a more militant direction. Increasingly cutting themselves off from the outside world, they gradually radicalized each other, and eventually the friends decided to wage battle in bin Laden’s global jihad, setting off for Afghanistan in 1999 in search of al-Qaeda.
Atta and the other members of the Hamburg group arrived in Afghanistan in 1999 right at the moment that the September 11 plot was beginning to take shape. Bin Laden and his military commander Muhammad Atef realized that Atta and his fellow Western-educated jihadists were far better suited to lead the attacks on Washington and New York than the men they had already recruited, leading bin Laden to appoint Atta to head the operation.
The hijackers, most of whom were from Saudi Arabia, established themselves in the United States, many well in advance of the attacks. They traveled in small groups, and some of them received commercial flight training.
Throughout his stay in the United States, Atta kept Binalshibh updated on the plot’s progress via e-mail. To cloak his activities, Atta wrote the messages as if he were writing to his girlfriend “Jenny,” using innocuous code to inform Binalshibh that they were almost complete in their training and readiness for the attacks. Atta wrote in one message, “The first semester commences in three weeks…Nineteen certificates for private education and four exams.” The referenced 19 “certificates” were code that identified the 19 al-Qaeda hijackers, while the four “exams” identified the targets of the attacks.
In the early morning of August 29, 2001, Atta called Binalshibh and said he had a riddle that he was trying to solve: “Two sticks, a dash and a cake with a stick down—what is it?” After considering the question, Binalshibh realized that Atta was telling him that the attacks would occur in two weeks—the two sticks being the number 11 and the cake with a stick down a 9. Putting it together, it meant that the attacks would occur on 11-9, or 11 September (in most countries the day precedes the month in numeric dates, but in the United States the month precedes the day hence, it was 9-11 in the United States). On September 5 Binalshibh left Germany for Pakistan. Once there he sent a messenger to Afghanistan to inform bin Laden about both the day of the attack and its scope.
Take Your Moment
Take a moment to remember the events of September 11, 2001. Where were you? What do you remember?
Never Forget USA is dedicated to the memory of those who lost their lives as a result of the attacks on the USA - September 11, 2001.
Never Forget that day, those events, and those memories. Remember where you were when you saw the towers collapse, when you saw the smoldering field, or the burned Pentagon. The people who died at the Twin Towers, near Shanksville, and at the Pentagon shall always live on. We are fortunate in America for our People.
Our People, you, make the difference.
Please join us on September 11th, every year, to memorialize those who lost their lives. For it was that time that our country was truly united. Our Flag is a symbol of our country and our unity.
Kennewick, WA – Southridge 9/11 Memorial. A 35-foot steel column from Ground Zero.
Prosser, WA – West Benton Fire District, Station 310
Cashmere, WA – 9/11 Spirit of America Memorial
Southridge 9/11 Memorial, Kennewick, WA
Take your moment for prayer, remembrance, and unity on September 11, 2020 at the Southridge 9/11 Memorial to commemorate those who lost their lives on September 11, 2001.
Lampson Crane coordinated to have it shipped out from NY/NJ Port Authority. There were many local contractors including Ray Poland & Sons, Apollo Mechanical, Heritage Landscape, Allan Electric, Frontier Fence, Central Pre-Mix, Ironworkers Local 14, Benton PUD, City of Kennewick, and dozens more who supported the construction of the Memorial with their money, resources, and labor. It was dedicated on September 11, 2011 - ten years after the the attacks on our country.
Patriot Day: When Is the National Moment of Silence on 9/11?
Every year on September 11, we remember those who have fallen as a result of the horrific terrorist attacks against the World Trade Center and the Pentagon.
A national moment of silence is observed every year to correspond with the terrorist attacks at 8:46 a.m. EST, which is the time American Airlines Flight 11 hit the north tower of the World Trade Center. The south tower, along with the Pentagon were also attacked that day. The U.S. Capitol was targeted, but the hijacked flight crashed in Pennsylvania before it reached that destination.
There were a total of 2,977 victims plus 19 Al-Qaeda members who perished as a result of the attacks. Thousands have also died due to 9/11 related illnesses, ABC reported.
Many remember the fallen in different ways. A bill was past in October 2001 to make September 11 a Patriot's Day.
More recently, in 2019, a law was passed in New York by Governor Andrew Cuomo requiring public schools to hold a moment of silence in remembrance of September 11, CBS reported. It's a way for the students to learn about the terrorist attacks and "their place in history."
"9/11 was one of the single darkest periods in this state's and this nation's history, and we owe it to those we lost and to the countless heroes who ran toward danger that day and the days that followed to do everything we can to keep their memory alive," Cuomo said at the time.
"By establishing this annual day of remembrance and a brief moment of silence in public schools, we will help ensure we never forget," he continued."Not just the pain of that moment but of the courage, sacrifice and outpouring of love that defined our response."
This year, amid the coronavirus pandemic, 9/11 victims' families will not read names at the World Trade Center Memorial in Manhattan. The New York Post reported that instead, the ceremony will include playing a recording of a past name-reading. This decision comes "out of an abundance of caution," an invite from the National September 11 Memorial & Museum stated.
"We will use recorded name readings from the Museum's 'In Memoriam' exhibition to ensure that your loved one is recognized and remembered," the invite from Alice M. Greenwald, president and CEO of the 9/11 Memorial & Museum, said.