Zacarias Moussaoui moves from Oklahoma to Minnesota, in order to attend flight school training there. Moussaoui drives there with Hussein al-Attas, a friend who will stay with him in Minnesota. Curiously, on August 11, someone breaks into the Norman, Oklahoma, apartment that remained unoccupied since Moussaoui moved out of it at the end of May 2001. A neighbor’s bicycle is used to break through the door of the vacant apartment and a bloodstain is left on the wall. A neighbor “[tells] reporters that furniture was overturned as if someone was looking for something.” [MSNBC, 12/11/2001; St. Paul Pioneer Press, 9/10/2002; US Congress, 10/17/2002]
August 11-15, 2001: Flight School Staff Become Suspicious of Moussaoui, Fear He May Be Hijacker
Flight engineer Tim Nelson and pilot Hugh Sims, who work at the Pan Am International Flight School where Zacarias Moussaoui trains to fly a Boeing 747-400, are immediately suspicious of Moussaoui, and their suspicions continue to grow after his arrival because: 
He sends unusual emails that are signed “zuluman tangotango” and laced with grammatical errors, even though he says he is a British businessman; [CNN, 3/2/2006] His e-mails also include abnormal comments such as, “E[mail] is not secure;” [Newsweek, 10/1/2001] He pays most of his $8,300 fee in hundred dollar bills. This makes Nelson suspicious, because he thinks cash is hard to track; [New York Times, 2/8/2002; Star-Tribune (Minneapolis), 4/24/2005; CNN, 3/2/2006] He is alone, whereas most trainees arrive in groups; [Star-Tribune (Minneapolis), 4/24/2005] He says he wants to fly a 747 not because he plans to be a pilot, but as an “ego boosting thing.” However, within hours of his arrival, it is clear he is “not some affluent joyrider,” as he is shabbily dressed; [New York Times, 2/8/2002; New York Times, 10/18/2002; Star-Tribune (Minneapolis), 4/24/2005] In addition, it is unusual that he has no aviation background, very little experience, and no pilot’s license. All other pilots at the center, even “vanity pilots”—wealthy individuals who just want the thrill of flying a large jet—have many times more flying hours than Moussaoui and are all licensed; [US Congress, 10/17/2002; Star-Tribune (Minneapolis), 4/24/2005; Rake, 5/2005] He has flown for 57 hours at flight school in Oklahoma, but not yet flown solo, which is unusual. The school’s manager of pilot training, Alan McHale, will later comment, “My worst student was a grandma, and I got her to solo after 21 hours;” [Star-Tribune (Minneapolis), 4/24/2005] He is not just buying a one-period joyride, but a whole course; [Star-Tribune (Minneapolis), 4/24/2005] He seems determined to pack a large amount of training in a short period for no apparent reason; [New York Times, 2/8/2002] He is “extremely” interested in the operation of the plane’s doors and control panel. [US Congress, 10/17/2002] He also is very keen to learn the protocol for communicating with the flight tower, despite claiming to have no plans to become an actual pilot; [New York Times, 2/8/2002] He talks to some Syrian airline pilots training at the facility, and the pilots tell Nelson that Moussaoui is fluent in Arabic. Nelson, who is already worried Moussaoui might be up to no good, thinks, “One more red flag;” [Star-Tribune (Minneapolis), 4/24/2005; CNN, 3/2/2006] The school’s accountant complains that Moussaoui’s payment is a couple of hundred dollars short, but that he does not have a credit card with him, even though he says he is an international businessman; [Star-Tribune (Minneapolis), 4/24/2005] and
Nelson thinks back to an incident in Japan when the captain was stabbed to death and the killer then flew the plane for 45 minutes before the co-captain regained control. He is concerned Moussaoui might perform a suicide hijacking, “Here’s the problem: You’ve got an aircraft that weighs upwards of 900,000 pounds fully loaded and carries between 50,000 and 57,000 gallons of jet fuel. If you fly it at 350 knots [about 400 miles per hour] into a heavily populated area, you’re going to kill a boatload of people.” After talking to instructor Clancy Prevost, who is also suspicious of Moussaoui (see August 13-15, 2001), both Sims and Nelson independently decide to call the FBI and Moussaoui is arrested soon after the calls are made (see August 16, 2001). [Star-Tribune (Minneapolis), 4/24/2005]
August 13-15, 2001: Flight Instructor Becomes Suspicious of Moussaoui
Although some staff at the Pan Am International Flight School became a little suspicious of Zacarias Moussaoui before he arrived (see August 11-15, 2001), within two days of his arrival at the school, Moussaoui’s behaviour makes his assigned instructor Clancy Prevost highly suspicious. This is because: Moussaoui has only flown for under 60 hours, whereas the second least experienced student Prevost ever had had 10 times as many hours. This lack of experience means Moussaoui does not really understand the instruction; [US District Court for the Eastern District of Virginia, Alexandria Division, 3/9/2006] When Moussaoui is asked what his goal is, he tells Prevost he wants to fly a 747 from London to New York, the same goal he gave in his original e-mail to the flight school. [Rake, 5/2005] This raises fears he has plans to hijack such a flight; [US Congress, 10/17/2002] When Prevost relates a story about a charter flight in the Middle East where getting the doors open was a problem, the story causes Prevost to ask Moussaoui whether he is a Muslim and Moussaoui replies in a strange tone, “I am nothing.” This makes Prevost worry so much that he ends the session, goes back to his motel, and calls the flight school to express his reservations about Moussaoui. He talks to his manager in the morning and says, “We’ll care [about having trained Moussaoui] when there’s a hijacking and he knows how to throw the switches and put them in the right position and all the lawsuits start coming in when they figure out we taught him how to do this”; Prevost then goes into a supervisors’ meeting and recommends calling the FBI, but becomes even more upset when he is told Moussaoui paid for his training in $100 bills.
As Moussaoui does not learn much during the day, Prevost invites him to observe a simulator session that evening, which Moussaoui does with interest. The following day Prevost meets the FBI, which has now been alerted by the school, and shares his feeling it would be a good idea to do a background check on Moussaoui. The FBI subsequently arrests Moussaoui (see August 16, 2001). [US District Court for the Eastern District of Virginia, Alexandria Division, 3/9/2006] Some claims later made about Moussaoui in the media may be inaccurate: He is said to mostly practice flying in the air, not taking off or landing. [Star-Tribune (Minneapolis), 12/21/2001; New York Times, 2/8/2002; Slate, 5/21/2002; New York Times, 5/22/2002] However, he is arrested after ground instruction and never flies the simulator, so it is unclear how this could happen. [US District Court for the Eastern District of Virginia, Alexandria Division, 3/9/2006] 9/11 Congressional Inquiry staff director Eleanor Hill will also later say that the reports saying he only wanted to pilot a plane in the air are untrue. [US Congress, 9/24/2002] In addition, the 9/11 Commission will comment, “Contrary to popular belief, Moussaoui did not say he was not interested in learning how to take off or land”; [9/11 Commission, 4/13/2004] It will be reported that he appears not to understand French, despite being from France, and does not specify the Middle Eastern country he says he comes from. [Star-Tribune (Minneapolis), 12/21/2001; Washington Post, 1/2/2002] However, at the trial Prevost will recall that Moussaoui spoke good French and that Moussaoui told him he had both French and Moroccan passports. [US District Court for the Eastern District of Virginia, Alexandria Division, 3/9/2006]
Prevost will later receive a controversial $5 million reward from the US Department of State’s Reward for Justice program. [Newsweek, 1/30/2008]
Before August 16, 2001: Moussaoui Writes Number of Spanish Militant in Address Book
Zacarias Moussaoui writes the phone number of Amer el-Azizi in his notebook. El-Azizi is a Spain-based militant who is linked to 9/11 mastermind Khalid Shaikh Mohammed (see (November 2001)) and is thought to have helped set up a meeting between Mohamed Atta and Ramzi bin al-Shibh in Spain in July 2001 (see Before July 8, 2001
and July 8-19, 2001). It is unclear when the number is written in Moussaoui’s notebook or what type of contact there is between Moussaoui and el-Azizi, if any. [Wall Street Journal, 4/7/2004] However, the connection to el-Azizi does not appear to be mentioned at Moussaoui’s trial (see March 6-May 4, 2006), even though it would be one of very few pieces of evidence potentially tying Moussaoui to the 9/11 plot. The reason for this is unclear. El-Azizi’s arrest shortly after 9/11 will be frustrated by Spanish intelligence (see October 2001 and Shortly After November 21, 2001) and he will go on to be involved in the 2004 Madrid bombings (see Before March 11, 2004 and 7:37-7:42 a.m., March 11, 2004).
August 15, 2001: CIA Told of Moussaoui’s Forthcoming Arrest, Searches for Information
The FBI’s Minneapolis field office tells the CIA that Zacarias Moussaoui will be arrested the next day (see August 16, 2001). The information is communicated to a CIA field office, which then informs the Counterterrorist Center (CTC) at CIA headquarters. The CTC searches for information on Moussaoui, but does not find anything. The CIA has information on Moussaoui at this point, but the information is related to one of Moussaoui’s aliases and the CIA apparently does not understand that the alias is used by Moussaoui (see April 2001). [Tenet, 2007, pp. 200-201]
August 15-September 10, 2001: Minneapolis Agent Warns Superiors of Moussaoui Seventy Times, Obstructed by Headquarters
After Zacarias Moussaoui is arrested (see August 16, 2001), the FBI’s Minneapolis field office becomes very concerned that he may be part of a larger operation involving hijacked aircraft and that he represents a real threat to US national security. One of the agents, Harry Samit, will later say that he and his colleagues are “obsessed” with Moussaoui. Samit sends over 70 communications warning about Moussaoui to the following: The Hezbollah, bin Laden, and Radical Fundamentalist Units at FBI headquarters (see August 20-September 11, 2001); Another FBI field office (see August 23, 2001); The CIA (see August 24, 2001); The FBI’s offices in Paris and London; The FAA; The Secret Service; The Immigration and Naturalization Service; and Another intelligence agency (possibly the National Security Agency).
While some of these bodies are responsive (see August 22, 2001 and August 24, 2001), Samit and his colleagues in Minnesota are forced to engage in a running battle with the Radical Fundamentalist Unit (RFU) at FBI headquarters, which obstructs their attempts to obtain a warrant to search Moussaoui’s belongings. Samit will later accuse the RFU of “criminal negligence” because they were trying to “run out the clock” to deport Moussaoui, instead of prosecuting him. [US Department of Justice, 11/2004, pp. 101-221 
; USA Today, 3/9/2006; Washington Post, 3/21/2006]
August 15-20, 2001: Minneapolis FBI Immediately Suspects Wider Airline Hijacking Plot
Immediately after learning of Zacarias Moussaoui’s suspicious behavior, Minneapolis FBI agent Harry Samit, one of the agents who arrests Moussaoui (see August 16, 2001), suspects he is preparing to hijack an airliner. He writes to a colleague, “That’s pretty ominous and obviously suggests some sort of hijacking plan.” [St. Paul Pioneer Press, 4/4/2006] Interviews with Moussaoui after his arrest will reinforce the Minneapolis FBI’s suspicions that he is involved in a wider terrorist plot against airliners (see August 16-17, 2001). And after interviewing Moussaoui’s associate Hussein al-Attas as well (see August 16, 2001), Samit is unequivocally “convinced… a hundred percent that Moussaoui [is] a bad actor, [is] probably a professional mujaheddin and this [is] not a joyride, that he [is] completely bent on the use of this aircraft for destructive purposes.” [US Department of Justice, 11/2004, pp. 114-5, 120-2 ] In the main initial memo from Samit to other FBI units, Samit describes Moussaoui as “extremely evasive” and “extremely agitated.” Samit also writes that Moussaoui appeared to by lying when he denied he had weapons training. Samit says, “Minneapolis believes that Moussaoui is an Islamic extremist preparing for some future act in furtherance of radical fundamentalist goals.” Samit expresses his belief Moussaoui is planning something with a 747-400. He is aware Moussaoui’s plan probably involves co-conspirators and writes “Moussaoui, al-Attas, and others yet unknown are conspiring to commit violations of [Federal anti-terrorism statutes],” and “there is reason to believe that Moussaoui and al-Attas are part of a larger international radical fundamentalist group.” Samit even suspects Moussaoui of two of the offenses he will eventually be charged with and plead guilty to (see April 22, 2005). The e-mail accompanying the main memo concludes, “[p]lease let me know a soon as [the Department] gives the go-ahead. We’re all counting on you!” [US Department of Justice, 11/2004, pp. 120-2 ; Minneapolis Star Tribune, 6/4/2006]
August 16, 2001: Moussaoui’s Belongings Possess Information Sufficient to Roll Up 9/11 Plot
After Zacarias Moussaoui is arrested, the FBI wishes to search his possessions (see August 16, 2001 and August 23-27, 2001). According to a presentation made by FBI agent Aaron Zebley at Moussaoui’s trial, the belongings are sufficient to potentially connect Moussaoui to eleven of the 9/11 hijackers: Mohamed Atta, Marwan Alshehhi, Ziad Jarrah, Hani Hanjour, Khalid Almihdhar, Nawaf Alhazmi, Fayez Banihammad, Ahmed Alhaznawi, Hamza Alghamdi, Satam Al Suqami, and Waleed Alshehri. The connections would be made, for example, through Ramzi bin al-Shibh, who spoke with Moussaoui on the telephone and wired him money (see July 29, 2001-August 3, 2001), and who was linked to three of the hijacker pilots from their time in Germany together (see November 1, 1998-February 2001). Bin al-Shibh also received money from Mustafa Ahmed al-Hawsawi, who was connected to hijacker Fayez Ahmed Banihammad (see June 25, 2001). [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006] Moussaoui’s notebook contained two recognizable control numbers for the Western Union wire transfers from bin al-Shibh and, according to McClatchy newspapers, a check on these numbers “would probably have uncovered other wires in the preceding days” to bin al-Shibh from al-Hawsawi. [McClatchy Newspapers, 9/11/2007] The discovery of the eleven hijackers could potentially have led to the discovery of some or all of the remaining eight plot members, as they were brothers (Wail and Waleed Alshehri, Nawaf and Salem Alhazmi), opened bank accounts together (see May 1-July 18, 2001 and June 27-August 23, 2001), lived together (see March 2001-September 1, 2001), obtained identity documents together (see April 12-September 7, 2001 and August 1-2, 2001), arrived in the US together (see April 23-June 29, 2001), and booked tickets on the same four flights on 9/11 (see August 25-September 5, 2001).
August 16, 2001: Zacarias Moussaoui Arrested
After being warned that Zacarias Moussaoui has raised suspicions at flight school (see August 11-15, 2001 and August 13-15, 2001), the FBI learns they can arrest him because he is in the US illegally. Four agents, Harry Samit, John Weess, Dave Rapp (all FBI) and Steve Nordmann (INS), drive to the Residence Inn, where Moussaoui and his associate Hussein al-Attas are staying. At the hotel Samit speaks on the phone to Joe Manarang from FBI headquarters; Manarang appeals for them to take the “cautious route” and not arrest Moussaoui. However, Samit refuses, as he has already notified the hotel clerk of their interest. Moussaoui is arrested around 4:00 p.m. on an immigration violation. At first Moussaoui shows the agents some documents, but then he becomes upset at missing his flight training. The FBI confiscates his belongings, including a computer laptop, but Moussaoui refuses permission for the belongings to be searched. A search of Moussaoui’s person yields a dagger with a two-inch blade, and another knife with a three-inch blade belonging to Moussoaui is found in the car. He also has boxing gloves and shin guards, and the arresting agents note he has prepared “through physical training for violent confrontation.” Al-Attas allows the agents to search his belongings and they believe al-Attas is in the US legally, so he is not arrested. However, al-Attas tells the FBI that Moussaoui is a radical religious Muslim and later makes several statements indicating Moussaoui may be a terrorist (see August 16, 2001). [MSNBC, 12/11/2001; US Congress, 10/17/2002; US District Court for the Eastern District of Virginia, Alexandria Division, 3/9/2006; Minneapolis Star Tribune, 6/4/2006] Al-Attas is arrested the next day (see August 17, 2001).
August 16, 2001: Roommate Interview Strengthens Case against Moussaoui
Hours after Zacarias Moussaoui is taken into custody in Minnesota, his friend and roommate Hussein al-Attas is interviewed by the FBI. The two men had recently driven together to Minnesota from Oklahoma (see August 10-11, 2001). According to a summary of the interview written at the time, “Al-Attas indicated that Moussaoui believes that it is acceptable to kill civilians who harm Muslims and that he approves of martyrs.” Al-Attas says Moussaoui talked about holy war every day when they roomed together. When asked if he had ever heard Moussaoui make a plan to kill those who harm Muslims, “Al-Attas admit[s] that he may have heard him do so, but that because it is not in [al-Attas’] own heart to carry out acts of this nature, he claimed that he kept himself from actually hearing and understanding.” Al-Attas says Moussaoui holds strong anti-American views and might be willing to act on his beliefs. Al-Attas describes Moussaoui as so secretive that he refuses to give his full name, identifying himself only as “Shaqil.” He also says that Moussaoui told him “true” Muslims must prepare themselves to fight and they should understand the suffering of Muslims in places like Palestine and Kosovo. He mentions that he and Moussaoui are carrying fighting gloves and shin guards to practice martial arts as part of Moussaoui’s philosophy that Muslims should be ready to fight nonbelievers. He has not heard Moussaoui mention any specific terrorist plot, but says that Moussaoui “is suspicious to me, too.”
FBI agents interview al-Attas again the following day, then charge him with violating the terms of his student visa by working at a mosque in Oklahoma, and arrest him. During the second interview, al-Attas says that Moussaoui follows the teachings of a sheikh whose name he would not disclose to him (see August 17, 2001). The agents contact FBI supervisors in Washington to seek approval to get a warrant to search Moussaoui’s computer. The supervisors are aware of what al-Attas said in the interview, but nevertheless they tell the Minnesota FBI agents that they do not want to attempt to get the warrant because it has not been shown that Moussaoui is an agent of a foreign power. The New York Times will note that the content of al-Attas’ interview “raise[s] new questions about whether top [FBI] officials… were aggressive enough in responding to that information.” [Washington Post, 1/31/2002; New York Times, 5/24/2002; Associated Press, 3/21/2006] Al-Attas will be arrested shortly after 9/11 and held as a material witness. He will later plead guilty to lying about Moussaoui. He lied in claiming that he did not know Moussaoui’s real name, lied about plans to go with Moussaoui to New York City in late August 2001, lied about Moussaoui’s desire to participate in holy war, and lied about a planned trip to speak to religious scholars who would encourage al-Attas to participate in holy war. He will be sentenced to time served, but will be kept imprisoned until the conclusion of Moussaoui’s trial in 2006 (see March 6-May 4, 2006). [Canadian Broadcasting Corporation, 7/22/2002; Associated Press, 10/22/2002] It is also later revealed that Moussaoui had recently convinced al-Attas to fight in Chechnya in order to prepare for holy war. [Wall Street Journal, 2/4/2002] Furthermore, the person who attempts to post bond for al-Attas had been the subject of a full-field FBI international terrorism investigation in Oklahoma. This unnamed person was a recruiter for a radical Palestinian group and a member of the Muslim Brotherhood. [US Congress, 7/24/2003] In post-9/11 media accounts, al-Attas is generally portrayed as someone who had been innocently and accidentally caught up with Moussaoui. But it appears that in the weeks before 9/11, US intelligence will consider the possibility that al-Attas may have been plotting with Moussaoui. For instance, a CIA cable that will be sent on August 24 is titled “Subjects Involved in Suspicious 747 Flight Training,” (see August 24, 2001) one that will be sent on August 28 has Moussaoui and al-Attas’ names as the title. [Canadian Broadcasting Corporation, 7/22/2002; Associated Press, 10/22/2002; 9/11 Commission, 7/24/2004, pp. 540]
