Chronicles the tragic end of TWA Flight 800, which triggers the longest and most complex investigation in NTSB history. Just 12 minutes after takeoff, the aircraft is ripped apart by a massive explosion in the skies above New York. With a possible terror attack on their hands, the FBI joins the NTSB in an urgent search for answers. Initial wreckage and recovered data provide few clues, leading to the bold decision to rebuild the entire plane. Eventually, experts zero in on an exploding gas tank, prompting questions about how the jet fuel could get hot enough to combust and precisely what sparked the blast.