Just finished watching Loose Change.
"Loose Change is a documentary written and directed by Dylan Avery and produced by Korey Rowe and Jason Bermas. The film presents an alternative explanation of events during the September 11, 2001 Terrorist Attacks. The film attempts to compensate for the perceived inadequacy of government investigations and the 9/11 Commission Report. It alleges that the attacks were not the result of the organization al-Qaeda but a series of cleverly executed events carried out by the US government. It was released through the creators' company, Louder than Words, and received wide attention after being featured on a Binghamton, New York local FOX affiliate, WICZ-TV (FOX 40)."- From Wikipedia
It was quite enlightening in a Michael Moore sort of way. They raise some very interesting points. Like what really happened to Flight 93? It is reported to have landed that day, was actually seen landing by airport workers at Cleveland Hopkins Airport.
Also the cell phone calls reportedly made from the plane. One man saying "Mom, it's Mark Balmer." When was the last time you called your mom and introduced yourself? Experiments after the fact showed that it was impossible to get cell phone reception from that altitude. (It wasn't until 2004 that American installed antenna on their planes to accommodate cell phones.)
And that is nothing compared to the crap about the Pentagon and the tower explosions.
It is worth seeing, but I guess with anything you have to decide what you believe.