Synopsis: On the morning of September 11, 2001, brothers Jules and Gedeon Naudet were working on a documentary about a rookie New York City firefighter. Hearing a roar in the sky, Jules turned his camera upward--just in time to film the only existing image of the first plane crashing into the World Trade Center. In a fateful instant, Jules and Gedeon became eyewitnesses to the most shocking and defining incident of our time.