Here is a long video by a Professer Fetzer who claims that 9/11 was a government plot. He is also big on the JFK assassination and he claims that Senator Wellstone's death was murder.
Sounds like a nut to me.
http://www.youtube.com/w/?v=x-RjohsWGO4
here is his home page:
http://www.d.umn.edu/~jfetzer/