The "Common Strategy" tactic was not designed to handle suicide hijackings.

Its 1997 final report did not discuss the possibility of suicide hijackings.

Mr. bin al-Shibh said he had been disappointed not to have taken part in the suicide hijackings.

The presentation mentioned the possibility of suicide hijackings but said that "fortunately, we have no indication that any group is currently thinking in that direction."

These threats were current, specific and concerned domestic suicide hijackings.

The final layer, security on board commercial aircraft, was not designed to counter suicide hijackings.

The "Common Strategy" approach was not designed to handle suicide hijackings, and the hijackers were able to exploit a weakness in the civil aviation security system.

Before the suicide hijackings, most of Mr. Bush's domestic trips were designed to push his legislative agenda.

The Gore Commission's report, having thoroughly canvassed available expertise in and outside of government, did not mention suicide hijackings or the use of aircraft as weapons.

None discussed the possibility of suicide hijackings or the use of aircraft as weapons.