The History Channel last night had a special called I-Witness to 9/11. Video shot from 9 different vantage points and 9 different New Yorkers. It was a great special but you have to watch the interview/video from Evan Fairbanks. The shot of the 2nd plane going into the 2nd tower I had not seen before.
Of course there is tons of speculation/controversy around the events of 9/11 and some of the controversy surrounding this video is included on the YouTube page for this video.