I had a Science lecture last year and the pentagon was used as an example why the plane exploded the way it did creating only the small area and why the flames suggested an explosion from a chemical due to the colour as opposed to aviation fuel, all the scientific evidence pointed to the crash claims being correct.

One thing the US government should control is the way agencies deal with evidence and the the disaster area, they make everything very official and like they are covering something up, same as area 51 and so on.... but you'll always get mad Americans as theirs still a group that believe the world is flat regardless to the amount of evidence is presented to them, Yanks