The hijackers in the September 11 attacks were 19 men affiliated with al-Qaeda. 15 of the 19 were citizens of Saudi Arabia, two were from the United Arab Emirates, one from Lebanon, and one from Egypt. The hijackers were organized into four teams, each led by a pilot-trained hijacker with three or four "muscle hijackers," who were trained to help subdue the pilots, passengers, and crew.
The first hijackers to arrive in the United States were Khalid al-Mihdhar and Nawaf al-Hazmi, who settled in San Diego County, California, in January 2000. They were followed by three hijacker-pilots, Mohamed Atta, Marwan al-Shehhi, and Ziad Jarrah in mid-2000 to undertake flight training in South Florida. The fourth hijacker-pilot, Hani Hanjour, arrived in San Diego in December 2000. The rest of the "muscle hijackers" arrived in early- and mid-2001.
As for the pilots who would go on to participate in the attacks, three of them were original members of the Hamburg cell (Mohamed Atta, Marwan al-Shehhi and Ziad Jarrah). Following their training at al-Qaeda training camps in Afghanistan, they were chosen by Bin Laden and al-Qaeda's military wing due to their extensive knowledge of western culture and language skills, increasing the mission's operational security and its chances for success. The fourth intended pilot, Ramzi bin al-Shibh, a member of the Hamburg cell, was also chosen to participate in the attacks yet was unable to obtain a visa for entry into the United States. He was later replaced by Hani Hanjour, a Saudi national.
Mihdhar and Hazmi were also potential pilot hijackers, but did not do well in their initial pilot lessons in San Diego. Both were kept on as "muscle" hijackers, who would help overpower the passengers and crew and allow the pilot hijackers to take control of the flights. In addition to Mihdhar and Hazmi, thirteen other muscle hijackers were selected in late 2000 or early 2001. All were from Saudi Arabia, with the exception of Fayez Banihammad, who was from the United Arab Emirates.
|Mohamed Atta||33||Egypt||American Airlines Flight 11|
|Abdulaziz al-Omari||22||Saudi Arabia|
|Marwan al-Shehhi||23||UAE||United Airlines Flight 175|
|Mohand al-Shehri||22||Saudi Arabia|
|Hani Hanjour||29||American Airlines Flight 77|
|Ziad Jarrah||26||Lebanon||United Airlines Flight 93|
|Ahmed al-Haznawi||20||Saudi Arabia|
|United Arab Emirates|
Bold letters note the hijackers who piloted the planes.
Two flight attendants called the American Airlines reservation desk during the hijacking. Betty Ong reported that "the five hijackers had come from first-class seats: 2A, 2B, 9A, 9C and 9B." Flight attendant Amy Sweeney called a flight services manager at Logan Airport in Boston and described them as Middle Eastern. She gave the staff the seat numbers and they pulled up the ticket and credit card information of the hijackers, identifying Mohamed Atta.
We have some planes. Just stay quiet and you'll be okay. We are returning to the airport.
Nobody move. Everything will be okay. If you try to make any moves, you'll endanger yourself and the airplane. Just stay quiet.
Nobody move please. We are going back to the airport. Don't try to make any stupid moves.
A United Airlines mechanic was called by a flight attendant who stated the crew had been murdered and the plane hijacked.
Two hijackers, Hani Hanjour and Majed Moqed were identified by clerks as having bought single, first-class tickets for Flight 77 from Advance Travel Service in Totowa, New Jersey with $1,842.25 in cash. Renee May, a flight attendant on Flight 77, used a cell phone to call her mother in Las Vegas. She said her flight was being hijacked by six individuals who had moved them to the rear of the plane. Unlike the other flights, there was no report of stabbings or bomb threats. According to the 9/11 Commission Report, it is possible that pilots were not stabbed to death and were sent to the rear of the plane. One of the hijackers, most likely Hanjour, announced on the intercom that the flight had been hijacked. Passenger Barbara Olson called her husband, Theodore Olson, the Solicitor General of the United States, stating the flight had been hijacked and the hijackers had knives and box cutters. Two of the passengers had been on the FBI's terrorist-alert list: Khalid al-Mihdhar and Nawaf al-Hazmi.
Spoken messages (from Ziad Jarrah) intended for passengers were broadcast over the air traffic control system, presumably by mistake:
Ladies and gentlemen, this is the captain. Please sit down. Keep remaining sitting(sic). We have a bomb on board. So sit.
Uh, this is the captain. Would like you all to remain seated. There is a bomb on board and are going back to the airport and to have our demands met. Please remain quiet.
|"[W]e've got to tell the Bureau about this. These guys clearly are bad. One of them, at least, has a multiple-entry visa to the U.S. We've got to tell the FBI." And then [the CIA officer] said to me, 'No, it's not the FBI's case, not the FBI's jurisdiction.'"|
Mark Rossini, "The Spy Factory"
Before the attacks, FBI agent Robert Wright, Jr. had written vigorous criticisms of FBI's alleged incompetence in investigating terrorists residing within the United States. Wright was part of the Bureau's Chicago counter-terrorism task force and involved in project Vulgar Betrayal, which was linked to Yasin al-Qadi.
According to James Bamford, the NSA had picked up communications of al-Mihdhar and al-Hazmi back in 1999, but had been hampered by internal bureaucratic conflicts between itself and the CIA and did not do a full analysis of the information it passed on to the agency. For example, it only passed on the first names, Nawaf and Khalid.
Bamford also claims that the CIA's Alec Station (a unit assigned to bin Laden) knew that al-Mihdhar was planning to come to New York as far back as January 2000. Doug Miller, one of three FBI agents working inside the CIA station, tried to send a message (a CIR) to the FBI to alert them about this, so they could put al-Mihdhar on a watch list. His CIA boss, Tom Wilshire, deputy station chief, allegedly denied permission to Miller. Miller asked his associate Mark Rossini for advice; Rossini pressed Wilshire's deputy but was rebuffed also.
Bamford also claims that al-Mihdhar and Hazmi wound up living with Abdussattar Shaikh for a time to save money. Shaikh was, coincidentally, an FBI informant, but since they never acted suspiciously around him, he never reported them. The CIA Bangkok station told Alec Station that Hazmi had gone to Los Angeles. None of this information made it back to the FBI headquarters.
Within minutes of the attacks, the Federal Bureau of Investigation opened the largest FBI investigation in United States history, operation PENTTBOM. The suspects were identified within 72 hours because few made any attempt to disguise their names on flight and credit card records. They were also among the few non-U.S. citizens and nearly the only passengers with Arabic names on their flights, enabling the FBI to identify them using such details as dates of birth, known or possible residences, visa status, and specific identification of the suspected pilots. On September 27, 2001, the FBI released photos of the 19 hijackers, along with information about many of their possible nationalities and aliases. The suspected hijackers were from Saudi Arabia (fifteen hijackers), United Arab Emirates (two hijackers), Lebanon (one hijacker) and Egypt (one hijacker).
The passport of Satam al-Suqami was reportedly recovered "a few blocks from where the World Trade Center's twin towers once stood"; a passerby picked it up and gave it to a NYPD detective shortly before the towers collapsed. The passports of two other hijackers, Ziad Jarrah and Saeed al-Ghamdi, were recovered from the crash site of United Airlines Flight 93 in Pennsylvania, and a fourth passport, that of Abdulaziz al-Omari was recovered from luggage that did not make it onto American Airlines Flight 11.
According to the 9/11 Commission Report, 26 al-Qaeda terrorist conspirators sought to enter the United States to carry out a suicide mission. In the end, the FBI reported that there were 19 hijackers in all: five on three of the flights, and four on the fourth. On September 14, three days after the attacks, the FBI announced the names of 19 persons. After a controversy about an earlier remark, U.S. Homeland Security Secretary Janet Napolitano stated in May 2009 that the 9/11 Commission found that none of the hijackers entered the United States through Canada.
Nawaf al-Hazmi and Hani Hanjour, attended the Dar al-Hijrah Falls Church, Virginia, Islamic Center where the Imam Anwar al-Awlaki preached, in early April 2001. Through interviews with the FBI, it was discovered that Awlaki had previously met Nawaf al-Hazmi several times while the two lived in San Diego. At the time, Hazmi was living with Khalid al-Mihdhar, another 9/11 hijacker. The hijackers of the same plane often had very strong ties as many of them attended school together or lived together prior to the attacks
Soon after the attacks and before the FBI had released the pictures of all the hijackers, several reports claimed some of the men named as hijackers on 9/11 were alive and had their identities stolen.