it's one of the most secure buildings in the world... they intentionally only released the bare minimum to maintain security.
I have no doubt that the original footage from that camera and the hundreds of other cameras on the building would show exactly what hit the building.
If they would just release it, it would either explain exactly how a giant airplane could make such a hole in the build and somehow vaporize at the same time leaving barely a trace of it's hull; Or maybe it was something else?
It could have been anything and might not even be important... There are sooo many possible answers. Maybe it was just a disgruntled airforce pilot who sympathized with the enemy and went off the deep end? Maybe he was in on it, put a missile into the building, and the Gov is embarrassed and covered it up? Would it matter?
Anybody who isn't stupid knows that when it comes to large catastrophic events like this, the media story is never 100% accurate. The story that is released is the one that will incite the least panic but get the most media coverage. They will NEVER tell you more than they feel they need to. I fully believe that we never got the full truth. However, I think it unlikely that it be something extreme like it being self-inflicted by our own government.