Presidential daily briefing papers have been released by the CIA. These papers deal with threats from a group associated with Osama bin Laden. A warning was given about a possible attack using an airplane. This warning was delivered to the president in a briefing.

The CIA has declassified over 100 pages of these papers, which were provided to two presidents. They detail the threat in the time leading up to a major attack.

Further information is available from the source, including details about the content of the briefing papers.