Dave Berkebile, the man who recorded the video, has since died, and his family members found it while going through his things. As he shows the smoke rising from the wreckage, Berkebile can be heard saying it sounded like a bomb went off and that the noise shook his home some 15 miles away.

Those collecting September 11 oral histories for the National Park Service believe this is the earliest footage of the crash that killed the 40 passengers and crew members on board.

[via Mediaite]