I will not see the movie.
I believe the events depicted are at best pure fiction, and at worst outright lies. Then again, I also believe that flight 93 never crashed.
I am a person who tends to recieve every "conspiracy theory" with a hearty "BS" response. After consideration, I believe this has a lot of truth to it.
I urge you believe what you want, but I urge also you to watch the Loose Change video.
Links:
911 Loose Change 2nd edition (google video)
Loose Change 2nd Edition torrent