Well I know that neocons do - they say zealots are blind to inconvenient truths but this pronouncement really defies belief:
Where was he when 9/11 kicked off? He was the Mayor of New York, who publicly pronounced that he was glad that George W. Bush was resident in the White House - surely he couldn't have forgotten that?
Cause or effect? Some of the nine eleven/Al Quaeda deniers are very excited - asserting that his "slip" is proof absolute that there was some sort of conspiracy. This interview has gone viral in hours.
Personally? I think it's much simpler; he is a fucking idiot and a liar - having told so many expedient lies in his career that he has finally tripped himself up, publicly. And that's par for the course for shabby grasping politicians the world over.