Here is a documentary about supposed government conspiracy surrounding the 9/11 terrorist attack, called "Loose Change".
Let me stress that I think this documentary is utter crap and the conclusions presented in it are laughable. However, I watched it because it shows many shots of the 9/11 events (planes hitting the buildings, buildings collapsing) I never saw before. Do you know of some online repository where I can watch for example the archived news footage from 9/11? There must be dozens and dozens of hours of it. I looked for it and didn't find anything substantial.