There is also a video that exists that shows the 2'nd world trade center tower exploding just a fraction of a second before the jet's nose hit the building. I don't believe the video is accurate myself, but some people do. It could be produced by people who wish to blame Israel for the 911 events or it could be an effort by the government to discredit some elements. For whatever reason, the video does exist;
I don't believe it either. Think about it for a second. You plant a bomb in the WTC and you are going to try and cover yourself by flying a plane into it? To what end?
If this is the picture from the video in question (I've seen the sequence floating around the web for several weeks and snagged this one) it was de-bunked. CLICK!