What really did happen on 9/11?

I've just watched a documentary called 911 Loose Change. It's a film that seeks to ask a lot of valid questions about 911. I'm generally not a conspiracy theorist (although I maintain a healthily cynical suspicion of politicians and those in power), and I've heard all the cranks putting their theories about, but there are enough questions in this film to indicate that all is not as it seems. I won't list all the points made here - download it, watch it, and post your thoughts as comments below.

It even seems to have enough interesting points to be shown in the UK Parliament on 14th June 2006.