Acting on a tipoff by the CIA, Thai intelligence puts 9/11 hijackers Khalid Almihdhar and Nawaf Alhazmi on its watch list. In addition, it puts an alias al-Qaeda leader Khallad bin Attash is using (Salah Saeed Mohammed bin Yousaf) on the watch list (see January 20, 2000). The CIA is aware that the three men arrived in Bangkok on January 8 (see January 8, 2000), but seems to be unable to locate them in Thailand (see January 13, 2000). The Thai authorities will note their departure from Bangkok on January 15, but will not stop them and apparently will not inform the CIA of this for some time (see January 15, 2000 and March 5, 2000). [Bamford, 2004, pp. 230; 9/11 Commission, 1/26/2004, pp. 6 
] The CIA is apparently unaware of Alhazmi’s full name at this point (see January 8-9, 2000), but this does not prevent the watchlisting. The CIA will not add the three to the US watch list until late August 2001 (see August 23, 2001).
January 13, 2000: CIA Officer Again Fails to Grant Permission to Inform FBI of Hijacker Almihdhar’s US Visa
Doug Miller, an FBI agent detailed to Alec Station, the CIA’s bin Laden unit, writes to Tom Wilshire, the unit’s deputy chief, about 9/11 hijacker Khalid Almihdhar. Miller had drafted a cable eight days before to tell the FBI that Almihdhar has a US visa, but Wilshire and another CIA officer had blocked the cable (see 9:30 a.m. – 4:00 p.m. January 5, 2000 and January 6, 2000). Miller asks Wilshire, “Is this a no go or should I remake it in some way?” However, Wilshire does not respond. This is apparently Miller’s last attempt to inform the FBI of Almihdhar’s visa. About a month later, Miller will have some draft cables in the CIA’s computer system deleted, but will ensure that this draft cable is saved. [US Department of Justice, 11/2004, pp. 241 ] The Justice Department’s inspector general will criticize Miller for not following up more and ensuring the information is passed to the FBI. [US Department of Justice, 11/2004, pp. 356 ] However, Miller will say that he has a relatively low rank at the CIA at this time, and that he could not have passed the information without CIA approval, as he would have been fired. [Congressional Quarterly, 10/1/2008]
January 13, 2000: CIA Says it Is Unable to Locate 9/11 Hijackers in Thailand
The CIA station in Bangkok, Thailand, sends a cable to Alec Station, the CIA’s bin Laden unit, saying that it is unable to locate 9/11 hijacker Khalid Almihdhar and two companions, who turn out to be 9/11 hijacker Nawaf Alhazmi and al-Qaeda leader Khallad bin Attash, in Bangkok. The three had been under surveillance in Malaysia (see January 5-8, 2000), but the CIA’s Bangkok station had been unable to pick them up at the airport when they flew to Thailand on January 8 (see January 8, 2000 and January 8, 2000). According to an official, this was because “when they arrived we were unable to mobilize what we needed to mobilize.” Despite the high priority allocated to the search by CIA headquarters (see January 9, 2000) and the fact bin Attash was under surveillance in Malaysia when he called the hotel where the three are staying in Bangkok (see (January 5-8, 2000)), they cannot be found. The precise steps taken to locate them are unknown. [9/11 Commission, 1/26/2004 ; 9/11 Commission, 7/24/2004, pp. 181, 502; US Department of Justice, 11/2004, pp. 247 ]
Mid-January 2000: CIA Asks NSA to Pass on New Information about 9/11 Hijacker Almihdhar, but NSA Fails to Do So
Following a request by the CIA, the NSA puts hijacker 9/11 Khalid Almihdhar on its watch list. This means that the NSA should pass details of any new monitored communications involving him to the CIA. [US Congress, 7/24/2003, pp. 157 ; 9/11 Commission, 1/26/2004, pp. 6 ] The CIA is looking for Almihdhar and knows he has a US visa (see January 13, 2000), but fails to add him to the State Department’s watch list until 19 months later (see August 23, 2001). The 9/11 Congressional Inquiry will later state: “In mid-January 2000, NSA queried its databases for information concerning Khaled [redacted]. These queries remained active until May 2000, but did not uncover any information.” In fact, the NSA intercepts eight of Almihdhar’s calls from San Diego to Yemen during this time and even gives some details about some of the calls to the FBI (see Spring-Summer 2000). However, they do not tell the CIA everything about them, despite the watch list requirement to provide the information. It is not clear why the NSA failed to share this with the CIA. It is also not known if or when Almihdhar was removed from the NSA watch list before 9/11. [US Congress, 7/24/2003, pp. 157 ]
Mid-January-March 2000: ’50 to 60’ CIA Officers Learn of 9/11 Hijackers’ Travel, but They Are Not Watchlisted and FBI Not Told They Are in US
Fifty to sixty CIA officers read cables reporting on travel by 9/11 hijackers Khalid Almihdhar and Nawaf Alhazmi. The cables are generated in connection with al-Qaeda’s Malaysia summit, which Almihdhar and Alhazmi attend and the CIA monitors (see January 5-8, 2000). Even though some of the cables state that Almihdhar has a US visa and Alhazmi has arrived in the US, the FBI is not informed of this (see, for example, January 6, 2000 and March 5, 2000), and the two men are not watchlisted until the summer of 2001 (see August 23, 2001). The cables are drafted at four field offices and at headquarters and are read by overseas officers, headquarters personnel, operations officers, analysts, managers, junior employees, CIA staff, and officers on attachment from the NSA and FBI. The CIA’s inspector general will comment: “Over an 18-month period, some of these officers had opportunities to review the information on multiple occasions, when they might have recognized its significance and shared it appropriately with other components and agencies.” [Central Intelligence Agency, 6/2005, pp. xiv ]
January 15, 2000: 9/11 Hijackers Alhazmi and Almihdhar Arrive in US
A week after attending the al-Qaeda summit in Malaysia (see January 5-8, 2000), 9/11 hijackers Nawaf Alhazmi and Khalid Almihdhar fly together from Bangkok, Thailand, to Los Angeles, California. [MSNBC, 12/11/2001] The passports of both men have indicators of their terrorist affiliation placed there by Saudi authorities to track them (see March 21, 1999 and April 6, 1999), but the indicators are apparently not noticed by US immigration officials, as they have not been informed of their significance (see Around February 1993). [9/11 Commission, 8/21/2004, pp. 10 ] The CIA will later claim that it lost track of them when they arrived in Bangkok and that it did not receive notification from the Thai government that Almihdhar and Alhazmi entered the US until March 2000 (see March 5, 2000). However, Almihdhar will later tell 9/11 mastermind Khalid Shaikh Mohammed that he and Alhazmi think they were watched and followed from Bangkok to Los Angeles by unknown individuals (see Mid-July 2000). [9/11 Commission, 7/24/2004, pp. 181, 215] One San Diego friend of the two hijackers, Mohdar Abdullah, will later allegedly claim that he was told in advance they were coming to Los Angeles to carry out an attack in the US (see Early 2000).
January 15, 2000: Thai Authorities Note 9/11 Hijackers Alhazmi and Almihdhar Depart Bangkok for US, Unclear Whether CIA Informed
Thai authorities note that 9/11 hijackers Khalid Almihdhar and Nawaf Alhazmi depart Bangkok, Thailand, for the US (see January 15, 2000). They had been put on a Thai watch list shortly before this at the CIA’s request (see January 13, 2000), but the watchlisting only means the Thais note their departure from Thailand—they are not stopped at the airport. The reason for the watchisting was that the CIA was unable to locate them in Thailand, and wanted to be notified of the two future 9/11 hijackers’ departure, so it could start tracking them again. However, it is unclear whether this information is passed to the CIA at this time. One possibility is that the Thais do not pass this information on and, according to author James Bamford, “[What’s] worse, the CIA didn’t bother to ask for it until months later.” When the CIA asks for the information in February, only one of the names, Alhazmi’s, is allegedly passed to CIA headquarters (see March 5, 2000). [Bamford, 2004, pp. 230; 9/11 Commission, 1/26/2004, pp. 6 ]
Early 2000-September 10, 2001: 9/11 Hijackers Have Several Links to Sheikh Omar Abdul-Rahman
The 9/11 hijackers have links to several people associated with “Blind Sheikh” Omar Abdul-Rahman, the spiritual head of the group that bombed the World Trade Center in 1993. Abdul-Rahman has been in prison since the mid-1990s. 
9/11 hijackers Khalid Almihdhar and Nawaf Alhazmi attend a mosque in San Diego that is visited by an unnamed associate of Abdul-Rahman who is under investigation by the Los Angeles FBI (see June 1999-March 2000); The mosque is also attended by Osama Basnan, who threw a party for Abdul-Rahman in 1992 (see Spring 2000); 9/11 hijacker Mohamed Atta is seen with Adnan Shukrijumah, son of Abdul-Rahman’s former translator (see May 2, 2001) and Atta and hijacker Marwan Alshehhi may attend a mosque run by his father (see 2000-2001); Hijacker Mohand Alshehri is seen near the Minnesota clinic where Abdul-Rahman is being held (see August 2001); Some hijackers have the same mailing address as Abdul-Rahman and at least one of his associates (see Before September 11, 2001); Khalid Almihdhar and other hijackers obtain false ID cards from Mohamed el-Atriss, an associate of an unindicted co-conspirator at Abdul-Rahman’s trial (see (July-August 2001)); [Lance, 2006, pp. 373] In addition, people attending a Bronx mosque are warned to stay away from lower Manhattan on 9/11 (see Early September 2001).
In early 2000, the Able Danger data-mining program apparently identifies Atta, Alshehhi, Alhazmi, and Almihdhar as members of al-Qaeda through their associations with people linked to Abdul-Rahman (see January-February 2000).
January 15-February 2000: Suspected Advance Man Al-Bayoumi Helps 9/11 Hijackers Settle in San Diego
Omar al-Bayoumi, a suspected Saudi spy, goes to great lengths to help future 9/11 hijackers Nawaf Alhazmi and Khalid Almihdhar settle in San Diego. Supposedly, al-Bayoumi meets them by chance in a Los Angeles restaurant and encourages them to move to San Diego, but the accounts of the meeting are highly doubtful (see February 1, 2000). The FBI’s “best source” in San Diego will later say that al-Bayoumi “must be an intelligence officer for Saudi Arabia or another foreign power.” A former top FBI official working on the al-Bayoumi investigation claims, “We firmly believed that he had knowledge [of the 9/11 plot], and that his meeting with them that day was more than coincidence.” [Newsweek, 7/28/2003] When Alhazmi and Almihdhar move into apartment 150 in the Parkwood Apartments in San Diego in early February, they indicate on their rental application that they have been staying at al-Bayoumi’s apartment in the same apartment complex since January 15, the day they arrived in the US (see January 15-February 2, 2000). (This would suggest the alleged accidental restaurant meeting never took place.) [Federal Bureau of Investigation, 10/3/2001 ] He is the co-signer and guarantor for their rental application, because they do not have established credit. [Federal Bureau of Investigation, 10/3/2001 ] He pays $1,500 cash for their first month’s rent and security deposit. Some FBI officials claim the hijackers immediately pay him back, others claim they do not. [Newsweek, 11/24/2002; US Congress, 7/24/2003 ] The apartment manager will later claim al-Bayoumi occasionally paid rent for Alhazmi and Almihdhar on other occasions. [Federal Bureau of Investigation, 10/3/2001 ] Shortly after they arrive in San Diego, al-Bayoumi throws a welcoming party to introduce them to the local Muslim community. [Washington Post, 12/29/2001] One attendee will later say an al-Bayoumi party “was a big deal… it meant that everyone accepted them without question.” [San Diego Union-Tribune, 10/25/2001] He also introduces hijacker Hani Hanjour to the community a short time later, and Hanjour is seen in his apartment later in the year (see Early 2000). [San Diego Union-Tribune, 9/14/2002] Cayson Bin Don, a friend of al-Bayoumi, will later say al-Bayoumi “spent a lot of time at Alhazmi and Almihdhar’s apartment.” [Federal Bureau of Investigation, 10/8/2001 ] Al-Bayoumi apparently loans the hijackers his cell phone until they can get phone service in their own apartment. On February 15, 2000, someone trying to call al-Bayoumi on his phone has the call answered by Alhazmi instead. [9/11 Commission, 7/24/2004, pp. 516] He tasks an acquaintance, Mohdar Abdullah, to serve as their translator and help them get driver’s licenses, Social Security cards, information on flight schools, and more. [San Diego Union-Tribune, 9/14/2002; US Congress, 7/24/2003 ]
January 15-February 2, 2000: 9/11 Hijackers Alhazmi and Almihdhar Allegedly Stay in Omar Al-Bayoumi’s Apartment
An FBI document from shortly after 9/11 states, “Rental records for the Parkwood Apartments [in San Diego] indicate that, prior to moving into apartment 150, hijackers Nawaf Alhazmi and Khalid Almihdhar lived with Omar al-Bayoumi” in apartment 152 at the same apartment complex. [Federal Bureau of Investigation, 10/3/2001 ] An FBI timeline put together later that month further clarifies that on a rental application on February 5, 2000, the two hijackers specified they had lived with al-Bayoumi from January 15 to February 2. [Federal Bureau of Investigation, 10/2001, pp. 52 ] January 15 is the same day the two hijackers arrive in the US (see January 15, 2000), which suggests the hijackers immediately went from the Los Angeles airport to al-Bayoumi’s apartment. Al-Bayoumi, a suspected Saudi intelligence agent, will later claim he only meets the hijackers by chance at a Los Angeles restaurant two weeks later (see February 1, 2000).
