I downloaded the 9/11 conspiracy web-flick Loose Change. It's an odd theory, that the US government planned the 9/11 disaster for the benefit of family and friends, and to give a pretext for America to go on to screw up a bunch of Muslim countries beyond recognition.
Like they needed to go to those kind of lengths for that.
You can find a fair summary of the plot on Wikipedia, so I won't waste my keyboard repeating it.
The thing is - you believe the people involved might actually think it a cool idea, but you doubt that they would actually be capable of managing a conspiracy of this size.
My favourite debunking of the Moon-Landing hoax is that Russians would have been tracking the lunar module extremely carefully, and it certainly wouldn't have been in their interest to keep quiet if NASA were pulling a fast one.
This line of questioning I think explodes the Loose Change hypothesis also. All those possible ways the truth could have got out - all those governments with no reason to help America hush up mass-murder.
The film is a nasty, amateurish, pseudo-scientific piece of opportunistic garbage. I'm slightly ashamed at wasting bandwidth downloading it - please don't make the same mistake.