From the only reliable source of news on the net, the Onion.  The true humor of course is that a cottage industry has arisen claiming that 9-11 was an inside job.  No belief, no matter how farcical, will fail to have fools and knaves to rally about it.  A useful resource to answer some of the whacked out contentions of the 9-11 Truther Movement is the Debunking the 9-11 Myths at Popular Mechanics.  Another first rate source is the Journal of Debunking 9-11 Conspiracy Theories.