The CIA’s bin Laden unit, Alec Station, reduces the FBI’s access to NSA material tracking al-Qaeda members. The FBI had previously used such intercepts to map al-Qaeda’s global network (see Late 1998-Early 2002). The NSA intercepts at least one call from the 9/11 hijackers in the US to an al-Qaeda communications hub in Yemen after this (see Mid-October 2000-Summer 2001 and (August 2001)), but does not tell the FBI. Authors Joe and Susan Trento will comment that by doing this and withholding the hijackers’ identities from the FBI, “the CIA effectively ended any chance in the months leading up to 9/11 of discovering that [Khalid Almihdhar and Nawaf Alhazmi] were actually al-Qaeda agents destined to play major roles in the 9/11 attacks.” The CIA repeatedly fails to tell the FBI what it knows about Alhazmi and Almihdhar (see 9:30 a.m. – 4:00 p.m. January 5, 2000, January 5, 2001 and After, and June 11, 2001). [Trento and Trento, 2006, pp. 194] There is a long history of the NSA not wanting other US government agencies to have access to NSA material about al-Qaeda (see December 1996, Late August 1998, Between 1996 and August 1998, and Before September 11, 2001).