We've already had this arguement, you should really check out the thread which Biblemark created, I've done my research, extensive it was. Everything I've seen is just questions or terrible evidence. I don't think it was an inside job.
Where are the passengers of the 9/11 planes if the Boeings were switched?
I totally agree, the happenings surronding 9/11-WTC attacks are very skeptical, I'm still not sure about the truth there.
The Pentagon WAS hit by a Boeing 757, read this:
http://www.abovetopsecret.com/pages/..._evidence.html