Divers find AirAsia crash pilots' black box

Investigators believe this will help them find out why the aircraft plummeted into the Java Sea on December 28 killing all 162 on board.

The first box, containing flight data, was recovered from the crash site on Monday. This second black box, with voice recordings, will be sent to the Indonesian capital Jakarta. 

It was pinned under heavy debris about 100ft under water.

Designed to survive extreme heat and pressure, the two devices should provide a full timeline of the plane’s 42-minute flight.