Factual back-up, sources, and further research materials:
Google Earth Exposes Pentagon Flyover Farce, or, Critiquing PentaCon (Smoking Crack Version) - Showing the absurdity of The PentaCon's premise
Five Video Frames Leaked in 2002 Show Moments of the Pentagon Attack
What do the frames show about the attack and its investigation or cover-up by authorities? This analysis suggests the answer is not the immediately obvious one.