This video is new to me, I scanned the forum and I didn't see it mentioned so I thought it was good enough to start a post . It is longish, over an hour , but it is in three parts so you can divide it up. The photographer, Richard Siegal, captured the collapses on digital video and it is an uninterrupted view of events after the impacts. There is an eyewitness describing on 1010 Wins (spelling?) (A NYC radio station) that he saw a military helicopter disappear behind one of the towers, followed by a huge fireball. There is also footage of a helicopter appearing to do a rescue, but then you can see definite flashes coming from it onto the top of the wtc, this was right before one of the collapses. Also, a good physics "review". There are also explosions recorded, which are very definite and very scary. You can hear the explosions resonate, then the effects on the building. See what you think. Warning, it is a little bit cheesy in the presentation, but I don't think the content can be faulted.
Download here:
http://www.question911.com/links.phpThe web site for the vid is here:
http://www.911eyewitness.com/