Why else would the U.S. govt hide so much of the details surrounding the crash, and that of the plane which crashed into the Pentagon - lots of questions surrounding that ... and the govt has only ever released a few grainy stills, which appeared to have been doctored, of that ... the Pentagon has a lot more than one crappy discount special camera focused on the Pentagon ... so why haven't they ever released any of that other footage?
Simple, the U.S. govt, as so often in the past, is hiding a lot of details from the public - to be clear, I for one, am NOT suggesting the U.S. govt had anything to do with the 911 attacks per se, but rather for whatever reasons is not comfortable releasing the details of the how it was handled; some suggest the U.S. govt had forewarning of the attack - for folks who think that's not possible, read up on Pearl Harbor - history often repeats itself ... sadly
Ron