Pilots for 9/11 truth have looked at the animation released by NTSB that shows the flight path of AA 77 that supposedly hit the pentagon. However, it completely contradicts the "official" flight path presented by the gov't.
Here is their page with the NTSB video comparing the "official" path to the one NTSB released. Why the discrepency? I don't know what this means, but NTSB won't address this issue or issue a correction.