On June 1st, 2009, Flight AF447, an Air France Airbus A330 flying from Rio de Janeiro to Paris, disappeared over the Atlantic Ocean with the loss of all 228 lives. How could a state-of-the-art airliner with elaborate electronic safety and navigation features and a faultless safety record simply vanish without trace? NOVA assembles a team of seasoned pilots, engineers and safety experts to examine the evidence that emerged in the weeks following this horrific disaster.