Since Im not much into these types of discussions since its impossible to prove anything one way or the other - the only thing I can contribute is that the idea that the US government would not do something like the conspiricy theorists propose is totally wrong:
Here is a link to a declassified document from the 1960s that portrays exactly what lengths the US agencies would go to - especially interesting is the attachment with plans:
http://www.gwu.edu/~nsarchiv/news/20...northwoods.pdf
And please - Im not taking either side - just providing real information