According to German newspapers, the Mossad gives the CIA a list of 19 terrorists living in the US and say that they appear to be planning to carry out an attack in the near future. It is unknown if these are the 19 9/11 hijackers or if the number is a coincidence. However, four names on the list are known, and these four will be 9/11 hijackers: Nawaf Alhazmi, Khalid Almihdhar, Marwan Alshehhi, and Mohamed Atta. [Die Zeit (Hamburg), 10/1/2002; Der Spiegel (Hamburg), 10/1/2002; BBC, 10/2/2002; Ha’aretz, 10/3/2002] The Mossad appears to have learned about this through its “art student spy ring.” Yet apparently, this warning and list are not treated as particularly urgent by the CIA and the information is not passed on to the FBI. It is unclear whether this warning influenced the decision to add Alhazmi and Almihdhar to a terrorism watch list on this same day, and if so, why only those two. [Der Spiegel (Hamburg), 10/1/2002] Israel has denied that there were any Mossad agents in the US. [Ha’aretz, 10/3/2002]
August 23-September 10, 2001: Flight 77 Hijackers Stay at Valencia Motel
From September 2 (or August 23, according to some reports) until the day before the attacks, five of the hijackers stay in Room 343 at the rundown Valencia Motel in Laurel, Maryland. The five men—Khalid Almihdhar, Majed Moqed, Nawaf Alhazmi, Salem Alhazmi, and Hani Hanjour—are later identified as the hijackers of Flight 77. Their suite has only one bedroom, with two double beds. Reportedly, they all leave it at 10 each morning and go out for the day in an old Toyota Corolla with California license plates. The motel’s manager later will state that only two men rented the room for one week, paying $308 for it with a credit card, though several long-term motel residents will remember a larger group. [Washington Post, 9/19/2001; Baltimore Sun, 9/20/2001; Chicago Tribune, 9/23/2001; Newsday, 9/23/2001; Washington City Paper, 9/28/2001; Cox News Service, 10/15/2001] During their time at the motel the five men show up several times at a nearby gym (see May 6-September 6, 2001). However, there are conflicting accounts that Almihdhar, Hanjour, and Nawaf Alhazmi stayed in San Diego until about September 9 (see Early September 2001).
August 25-27, 2001: Hijackers Alhazmi and Almihdhar Buy 9/11 Plane Tickets Despite Presence on Watch List
Hijacker Khalid Almihdhar buys his 9/11 plane ticket on-line using a credit card; hijacker Nawaf Alhazmi does the same two days later, and also buys a ticket for his brother Salem (see August 25-September 5, 2001). Both men were put on a terrorist watch list on August 23 (see August 23, 2001), but the watch list only means they will be stopped if trying to enter or leave the US. There is another watch list that applies to domestic flights that some of their associates are on, but they are only placed on the international watch list (see April 24, 2000). Procedures are in place for law enforcement agencies to share watch list information with airlines and airports and such sharing is common, but the FAA and the airlines are not notified about this case, so the purchases raise no red flags. [Los Angeles Times, 9/20/2001; US Congress, 9/26/2002] An official later states that had the FAA been properly warned, “they should have been picked up in the reservation process.” [Washington Post, 10/2/2002] On September 4 and 5, 2001, an FBI agent will attempt to find Alhazmi and Almihdhar in the US, but will fail to conduct a simple credit card check that should have revealed these purchases (see September 4-5, 2001).
August 25-September 5, 2001: 9/11 Hijackers Spend Over $30,000 on 9/11 Tickets
All the 9/11 hijackers book their flights for September 11, 2001, using their apparent real names. The total cost of the tickets is in excess of $30,000: 
August 25: Khalid Almihdhar, who was watchlisted two days previously (see August 23, 2001), and Majed Moqed book tickets for American Airlines flight 77 using the AA.com website. They are collected from the American Airlines ticket counter at Baltimore Washington International Airport on September 5. The tickets were not mailed, because the shipping address did not match the credit card address. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72, 74 
] August 26: Wail Alshehri buys a ticket for American Airlines flight 11 over the phone with his debit card. His brother Waleed buys a ticket for the same flight at the AA.com website using his debit card. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 ] August 27: Nawaf Alhazmi, who was watchlisted four days before (see August 23, 2001), buys tickets for himself and his brother Salem for American Airlines flight 77 through Travelocity from a Kinkos computer in Laurel, Maryland, using his debit card (see August 25-27, 2001). [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 ] August 27: Saeed Alghamdi uses his debit card to purchase tickets for United Airlines flight 93 for himself and Ahmed Alnami from the UA.com website. The tickets are not paid for until September 5, 2001, due to a problem with the debit card. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72 ] August 27: Fayez Ahmed Banihammad uses his visa card to purchase tickets for himself and Mohamed Alshehri for United Airlines flight 175 over the telephone. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 72-73 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 28: Mohamed Atta uses his debit card to buy tickets for American Airlines flight 11 for himself and Abdulaziz Alomari from the AA.com website. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 28: Waleed Alshehri purchases a ticket for Satam Al Suqami for American Airlines flight 11 in person from the company’s counter at Fort Lauderdale Airport. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 73 ] August 28: Marwan Alshehhi purchases a ticket for United Airlines flight 175 from the company’s counter at Miami International Airport. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 73 ] August 29: Hamza Alghamdi books tickets for himself and Ahmed Alghamdi for United Airlines flight 175 from the UA.com website. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 29: Ahmed Alhaznawi creates a new e-mail account and Travelocity.com account and uses them to book a ticket for himself on United Airlines flight 93. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006, pp. 74 ] August 30: Ziad Jarrah purchases a ticket for himself for United Airlines flight 93 from the UA website. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ] August 31: Hani Hanjour purchases a ticket for American Airlines flight 77 from ATS Advanced Travel Services in Totowa, New Jersey, paying in cash. [US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ]
At least five tickets are one way only. [Los Angeles Times, 9/18/2001] There are numerous connections between the hijackers booked on the four flights by this point: Hijackers on different 9/11 flights arrived in the US on the same plane. For example, Salem Alhazmi (Flight 77) arrived with Abdulaziz Alomari (Flight 11), and Fayez Ahmed Banihammad (Flight 175) arrived with Saeed Alghamdi (Flight 93) (see April 23-June 29, 2001); Two of the pilots, Mohamed Atta and Marwan Alshehhi, train and live together, and have a joint bank account (see (Mid-July 2000 – Early January 2001), July 6-December 19, 2000, and June 28-July 7, 2000); Hijackers from different planes open bank accounts together (see May 1-July 18, 2001 and June 27-August 23, 2001); and The hijackers obtain identity documents together (see April 12-September 7, 2001 and August 1-2, 2001).
Six hijackers also provide the same phone number and three use the same address. [Miami Herald, 9/22/2001]
August 27, 2001: INS Given Non-Urgent Request to Determine Visa Status of 9/11 Hijackers Alhazmi and Almihdhar
The FBI contacts the State Department and the INS to determine the visa status of recently watch listed hijackers Nawaf Alhazmi and Khalid Almihdhar. Almihdhar’s visa obtained in June is revoked the same day; Alhazmi’s visa has already expired and he is in the country illegally. [US Congress, 7/24/2003 ] However neither agency is asked “to assist in locating the individuals, nor was any other information provided [that] would have indicated either a high priority or imminent danger.” An INS official later states, “if [the INS] had been asked to locate the two suspected terrorists… in late August on an urgent, emergency basis, it would have been able to run those names through its extensive database system and might have been able to locate them.” The State Department says that “it might have been able to locate the two suspected terrorists if it had been asked to do so.” [US Congress, 9/20/2002]
August 27-28, 2001: NSA Approves Passage of Key Information about 9/11 Hijacker Almihdhar toColeInvestigators, but FBI Headquarters Continues to Withhold It
The NSA’s representative to the FBI asks the NSA for permission to pass intelligence information about 9/11 hijackers Khalid Almihdhar and Nawaf Alhazmi to FBI criminal agents investigating the bombing of the USS Cole and permission is granted the same day, but FBI headquarters does not forward this information to the Cole investigators. The request is made on behalf of FBI headquarters agent Dina Corsi, but Corsi does not want the agents to launch a criminal investigation to find Almihdhar in the US—she believes the information will be useful to them because of Almihdhar’s connection to the Cole bombing. The information identifies Almihdhar as an “Islamic extremist” and says that he traveled to Kuala Lumpur, where he met an associate named Nawaf (see January 5-8, 2000). This links Almihdhar to the Cole bombing because the FBI thinks one of the bombers, Fahad al-Quso, may have traveled to Kuala Lumpur at the same time as Almihdhar. Although the 9/11 Commission will say that Corsi “had permission to share the information” with the Cole investigators, she apparently does not do so, even though it is clear from conversations they have around this time that they want it (see August 28, 2001, and August 28, 2001, August 28-29, 2001, and August 29, 2001). [9/11 Commission, 7/24/2004, pp. 271, 539; US Department of Justice, 11/2004, pp. 276-7, 283, 286, 294, 304 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ]
August 28, 2001: FBI Supervisor Says Search for 9/11 Hijacker Almihdhar Should Be Criminal, Not Intelligence Investigation
After learning that FBI headquarters wants the search for 9/11 hijacker Khalid Almihdhar to be an intelligence investigation, FBI supervisor Jack Cloonan protests, saying a criminal investigation would be more appropriate. Cloonan, an agent on the I-49 al-Qaeda squad at the FBI’s New York office, says that the search should be conducted by criminal agents, as they would have more freedom and resources, due to an existing indictment of Osama bin Laden. Other agents on the squad make the same argument (see August 23, 2001 and August 28, 2001). However, in the end the search will be conducted as an intelligence investigation, but will not find Almihdhar before 9/11 as only one inexperienced agent will be assigned to it (see August 29, 2001). [Wright, 2006, pp. 353]
August 28, 2001: FBI Headquarters Asks New York Office to Open Intelligence Investigation into 9/11 Hijacker Almihdhar
FBI headquarters agent Dina Corsi asks the FBI’s New York field office to open an intelligence investigation into future 9/11 hijacker Khalid Almihdhar and locate him in the US. Corsi’s written request mentions Almihdhar’s arrival in the US in July 2001 (see July 4, 2001), his previous travel to the US in January 2000 with Nawaf Alhazmi (see January 15, 2000), his attendance at al-Qaeda’s Malaysia summit (see January 5-8, 2000), his association with an al-Qaeda communications hub in Yemen (see Early 2000-Summer 2001), and similarities between his travel and that of Fahad al-Quso, Ibrahim al-Thawar (a.k.a. Nibras), and Khallad bin Attash (see January 13, 2000), operatives involved in the bombing of the USS Cole. Corsi does not mention that the CIA knows bin Attash also attended the Malaysia summit, as this information has not officially been passed to the FBI yet. [US Department of Justice, 11/2004, pp. 304 ]
August 28, 2001: USSColeInvestigator Receives Almihdhar Memo, FBI Headquarters Forces Him to Delete It
Steve Bongardt, an FBI criminal agent investigating the bombing of the USS Cole, receives an e-mail from FBI headquarters asking the FBI’s New York office to start looking for future 9/11 hijacker Khalid Almihdhar under an intelligence investigation, but is forced to delete it following an argument with headquarters. The e-mail was not addressed to Bongardt, but forwarded to him by a supervisor, possibly in error. However, Bongardt calls Dina Corsi, the headquarters agent who wrote the e-mail, and expresses his surprise at the information contained in it, saying: “Dina, you got to be kidding me! Almihdhar is in the country?” He tells her the search should be conducted as a criminal investigation, not an intelligence investigation. Corsi incorrectly replies that the “wall” prevents the search from being carried out by criminal agents (see Early 1980s and July 19, 1995), as the investigation requires intelligence from the NSA that criminal agents cannot have, and she forces Bongardt to delete the e-mail from his computer (see August 29, 2001). [9/11 Commission, 7/24/2004, pp. 271; US Department of Justice, 11/2004, pp. 304 ; Wright, 2006, pp. 353]
August 28, 2001:ColeAgent Argues with FBI Headquarters over Search for 9/11 Hijacker Almihdhar
FBI New York agent Steve Bongardt, FBI headquarters agent Dina Corsi, and acting FBI Osama bin Laden unit head Rod Middleton, who is Corsi’s supervisor, discuss whether the search for future 9/11 hijacker Khalid Almihdhar should be an intelligence or criminal investigation. Bongardt argues that the search should be a criminal investigation because of Almihdhar’s connection to the bombing of the USS Cole and because more agents could be assigned to a criminal investigation. (Note: the office only has one rookie intelligence agent available.) He also says a criminal investigation would have better tools, such as grand jury subpoenas, which are faster and easier to obtain than the tools in an intelligence investigation. Corsi and Middleton say that the “wall” prevents the intelligence information necessary for the case being shared with criminal investigators, so the search must be an intelligence investigation. (Note: Corsi and Middleton are wrong (see August 29, 2001).) Bongardt is unhappy with this and requests an opinion from the Justice Department’s national security law unit (see August 28-29, 2001). [US Department of Justice, 11/2004, pp. 307 ]
