Nothing is stopping anyone, and we have the Patriot Act to thank, or rather 9/11 I guess. I've been doing a lot of research about the whole attack, and I have found that there still isn't really a credible explanation for Building 7, molten metal, or the presence of sulphur and thermite found on one of the beams. Steven Jones, a physics professor from BYU, is still trying to do the tests to find out how many beams he found it on to see if it was a big deal, but unfortunately, its pretty impossible to get a hold of any of materials anymore. Also, if a airliner jet really DID hit the Pentagon, why not release the tape and prove it? I don't believe we'll ever have the answer to any of those questions, and will be forced to accept the official answer, but I think the Project for the New American Century is well on its way to becoming a reality. Read all about it:

Project for the New American Century - Wikipedia, the free encyclopedia