--In June 2009, Air France Flight 447 plunged into the Atlantic Ocean, killing all 216 passengers and 12 aircrew in the deadliest plane crash in Air France history.
Rescuers only managed to retrieve bodies and debris from the plane after several days, while investigators took nearly two years to get to the main wreckage including black boxes.
---While authorities were able to locate the first major wreckage within five days of the accident, initial investigation was hampered because the aircraft's black boxes were not recovered from the ocean floor until May 2011, nearly two years late