[Immortal Goat]

Actually, I believe the burden of proof lies with the Government in this instance. We as citizens do not have access to all of the information about what happened that day. As such, we can only speculate, but never prove. It's the government's job to put all speculation to rest, and thus far, they have not released any definitive proof that they aren't lying to us.

The missile idea is just as plausible as the plane idea, simply because there is enough evidence to suggest that it was, in fact, not a plane, but nothing other than a missile could have caused that much damage. It's the government's job to show us something that inarguably shows us that it was a plane, or the conspiricy theories will continue.