Excerpt from a long discussion: The Ultimate 9/11 'Truth' Showdown: David Ray Griffin vs. Matt Taibbi.
David Ray Griffin responds: You suggest that all of the timeline discrepancies I have documented are "minor." Let's look at some of them.
As I mentioned earlier, the military had originally said that the FAA notified it about Flight 175 at 8:43, which was 20 minutes before the flight would strike the South Tower. But the 9/11 Commission claimed that this notification did not happen until 9:03, when the building was being struck. This 20-minute difference cannot be described as minor: It makes all the difference with regard to whether the military could have intercepted the flight.
Turning to the discrepancy about Flight 77: NORAD had said in 2001 that the notification from the FAA had come at 9:24. The 9/11 truth movement asked why, then, was the plane not intercepted before it struck the Pentagon at 9:38. The 9/11 Commission, agreeing that the 9:24 notification time "made it appear that the military was notified in time to respond," solved this problem by claiming that the military "never received notice that American 77 was hijacked." This claim, besides contradicting what NORAD had been saying for almost three years, also contradicted the aforementioned FAA memo sent to the Commission by the FAA -- which said that the FAA had actually notified the military long before 9:24. The Commission, besides simply ignoring this memo in its final report, also contradicted statements by the FBI and the Secret Service. The discrepancy cannot possibly be called minor.
The same is true of the discrepancy about Flight 93. The 9/11 Commission claimed that the military "first received a call about United 93 at 10:07," four minutes after it had crashed. But General Larry Arnold, the head of NORAD's Continental region, had testified that the military had been aware of the flight for over 20 minutes before it crashed. He and many other officials -- including Deputy Secretary of Defense Paul Wolfowitz -- even said that the military was tracking Flight 93 and was in position to shoot it down. Hardly a minor discrepancy, especially given the evidence that the military did shoot the plane down.