There are a few problems with the conspiracy theory. And call it what you want, but saying the events of that day aren't what we were led to believe, and that the truth is being covered up, is the definition of a conspiracy theory.

First, there are far more experts (one a French architect in Paris) who says the evidence definitely leads to the official story being the true story.

Second, Bin Laden and Al Qaeda admitted to doing it.

In situations like this I rely on Occam's razor theory.

For the record:

Kennedy was shot by a lone gunman. This has been proven beyond all doubt, numerous times now.

I also want to add that I really hope we're not to the point of bestowing any credibility on hollywood stars. I work here. I know many of these people. By and large the public part of the entertainment community is populated by morons. Producers and writers can be a bit smarter, but if you considered every "movie star" to be an imbecile, you'd be right more than you'd be wrong.