Ya can't prove a negative. If the conspiracy dudes think they have a better theory, it's up to them to provide the evidence to substantiate their theory. The problem they have, of course, is that there is no evidence to substantiate their theories, which does leave them in a bit of a bind.

There are apparently a fair number of people who can't differentiate between real evidence and the stuff that pours out of Alex Jones' mouth, however. Those people are his target audience of course, as they make him the most money. I don't really blame him. I mean, if I could make up stuff and get rich off the ignorance of others, I'd probably do it too. Well, maybe not, but I'd at least consider it, if the amount of money was large enough.

BTW, there were airplane parts found at the Pentagon. Not to mention many witnesses who saw the plane come in, hit the ground, and then plow into the side of the building. But who knows, maybe some kind of mysterious rays were used on the witnesses to make them just THINK they saw a big plane. Or maybe, just maybe, they saw a plane because there was one. That'd kind of explain the plane parts found scattered around the area too.