It's a good question. Why won't they release the 84 videos in existence? Some have speculated that it's because a 757 did not hit the Pentagon, and that instead, it was a missile, or, in your words, "a very stealth weapon." Others have speculated it's because the Pentagon's defenses were, in fact, activated, and that is considered "classified information." Others have speculated that the military plane overhead appears in some of the videos. Others have speculated that it was indeed Flight 77.

The fact of the matter is, there is a lot of evidence to indicate it was Flight 77. Some of the information promoted about the Pentagon is nonsense. However, because the videos are not available, it's impossible to say with 100% conviction what exactly hit the Pentagon. Therefore, I don't think it's wise for anyone to state, as fact, that something other than Flight 77 hit the Pentagon.

It's better to ask for the videos (which is incriminating in and of itself that they refuse to release them) because you don't want to promote something that may be wrong. They will use it against you.