August 21-22, 2001: FBI Agents Finally Realize 9/11 Hijacker Almihdhar Is in US

An FBI agent detailed to the CIA’s bin Laden unit locates CIA cables saying that future 9/11 hijacker Nawaf Alhazmi entered the US in early 2000. The agent, Margaret Gillespie, then checks with the US Customs Service and discovers that another future 9/11 hijacker, Khalid Almihdhar, entered the US on July 4, 2001, and there is no record he has left the country. As there is “an imperative to find anyone affiliated with al-Qaeda if they [are] believed to be in the US,” Gillespie immediately contacts Dina Corsi, an FBI agent in its bin Laden unit. Gillespie, who has been examining the USS Cole bombing and al-Qaeda’s Malaysia summit for some time, will later say that when she learns of their arrival in the US, “it all clicks for me.” The Justice Department’s office of inspector general will find that Gillespie’s “actions on receipt of the information clearly indicate that she understood the significance of this information when she received it. She took immediate steps to open an intelligence investigation.” Gillespie and Corsi meet with Tom Wilshire, a CIA officer involved in the investigation (see August 22, 2001), and Almihdhar and Alhazmi are soon watchlisted (see August 23, 2001). [US Department of Justice, 11/2004, pp. 300-301, 313 ; US District Court for the Eastern District of Virginia, Alexandria Division, 7/31/2006 ]