My uncle was in the airforce at the time of the attacks. He's heard first hand that we shot down 93. Also, that 9/11 conspiracy video that was floating around on the net "claims" that you can't make cell phone calls from cruise altitude, but they aren't sure what altitude the plane was at when the calls were made. Judging from the lack of debris at the "scene of the crash" I would have to say that a missle was involved. That's my opinion anyway.