mmm... I don't believe this one. If there were really technologies like that out there, they would find their way to the market, inside or outside of the US... one way or another you can't keep a secret that big for ever.
Why wouldn't the Nazis or the Japanese have unleashed this technology during WWII rather than losing? Did big oil pay them off too?
And his story about these mysterious scientists who contact him but get shut up by the government sound unbelievable. (They sent a guy smarter than Einstein to Iraq? really?!?)