Not for any rational person there isn't
As an American I take great offense to the absurd notion, put forth in the face of all evidence to the contrary, that the US gov't had anything to do with the Sep. 11 terrorist attacks.
Only a complete idiot, an insane religious fanatic, a hopelessly ignorant fool, or the mentally deranged could possibly place any belief in such irrational, conspiratorial fairy tales. You might as well believe that aliens are secretly running world financial markets. It's crazy, and it's a great insult to the 3,000 who died at the hands of Al Queda terrorists.