On September 11, 2001, brothers Gedeon and Jules Naudet were in lower Manhattan taping a documentary on the Engine 7, Ladder 1 firefighters when Jules suddenly heard a roar from above and turned his camera upward. In doing so, he captured the only known video of the first plane striking the World Trade Center. Cameras still rolling, Jules followed the firefighters into the heart of what would soon be known as Ground Zero. Gedeon also rushed to the scene with members of Ladder 1. Over the next several hours, Gedeon and Jules Naudet captured video unlike any broadcast since, including 45 minutes of footage from within the North Tower as the rescue effort was underway and scenes of escape in the minutes before the building collapsed. The updated version, in honor of the five year anniversary of the attacks will include follow-up interviews with 20 firefighters from the same Manhattan firehouse where the documentary was originally filmed. The narration by Robert De Niro was updated as well.