Remember the images of the first plane hitting the World Trade Center towers? There was only one video of it, captured in the background of an instructional video that, of all people, the firefighters were making in lower Manhattan on September 11th. Well, it turns out that that’s just a small part of an entire 90-minute video, the rest of which captured the rush to the scene, the mayhem inside the buildings, and the collapse of the south tower. Dozens of people on the video died that day; the tape may never be seen by the public.