After a long delay on a hot July evening in 1996, TWA Flight 800 leaves John F. Kennedy Airport carrying 230 passengers and crew en route to Paris. Minutes after takeoff, the Boeing 747 jumbo jet suddenly explodes without warning, killing everyone aboard. Was it a bomb? A missile? A design flaw? To find the answer, the NTSB must attempt the unthinkable: rebuild the entire plane, piece by shattered piece.