Reply #87: no, but because of specific warnings

[tabatha]

that a large attack was to be perpetrated on the US, and that planes would be involved - airlines could have been warned. If cockpit doors had been secured - hijackers with box-cutters would not have been able to hijack planes. Even if cockpit doors had not been secured, agents on planes could have been on the look out and easily have foiled box-cutter touting hijackers.

If as much fuss had been made about these warnings as had been made with the very "non-imminent" London "bombers" - Sep 11 would never have happened. But there was not so much as a whisper to the airlines, and Bush continued whacking brush instead of whacking terrorists.

List of warnings here:

http://www.cooperativeresearch.org/timeline.jsp?timeline=complete_911_timeline&warning_signs:_specific_cases=foreignIntelligence