September 11, 2001 - five years after the attacks many people are asking questions about what happened on that day in New York, Washington and Pennsylvania. Websites, articles, books and documentaries have put forward a variety of alternate theories to the government's account of what happened. The most popular of these is a documentary called "Loose Change." Now, a book dealing with many of these theories has just been published by the magazine Popular Mechanics, it's called "Debunking 9/11 Myths: Why Conspiracy Theories Can't Stand Up to the Facts." In a Democracy Now! national broadcast exclusive, we host a debate between the filmmakers of Loose Change and the editors of Popular Mechanics on 9/11.