August 23, 2001:
The "very important subject" discussed for almost six hours by Bush with his core national security team would likely have been the CIA's action the day before placing four wanted Al-Qaeda terrorists on the "watchlist" of persons to be detained if located in the US. On August 23 the Agency sent "cables to the State Department, the FBI, and the Immigration and Naturalization Service, requesting that 'four bin Laden related individuals' including Almidhar and Alhazmi, be placed on the watchlist." (Washington Post, A8, September 21, 2002) Two of those - Khalid Almidhar and Nawaf Alhazmi - subsequently led the hijacking of American Airlines Flight 77 that slammed into the Pentagon.
August 29, 2001:
According to author Lawrence Wright, on this day there is a conference call between FBI field agent Steve Bongardt, FBI headquarters agent Dina Corsi, and a CIA supervisor at Alec Station, the CIA’s bin Laden unit, who tells Bongardt to stand down in the search for future 9/11 hijacker Khalid Almihdhar.
Either somebody is lying or this is grounds for an investigation into a LIHOP scenario involving an AQ mole in the CIA blocking the transfer of information. With this involving the FBI and CIA, I side with "somebody is lying".