It's one of the most important pieces of forensic evidence following a plane crash: The so-called “black box." There are actually two of these remarkably sturdy devices: the cockpit voice ...

WASHINGTON -- It's one of the most important pieces of forensic evidence following a plane crash: The so-called "black box." There are actually two of these remarkably sturdy devices: the cockpit ...

The so-called “black box” is one of the most important pieces of forensic evidence following a plane crash It's one of the most important pieces of forensic evidence following a plane crash ...

It's one of the most important pieces of forensic evidence following a plane crash: The so-called “black box." There are actually two of these remarkably sturdy devices: the cockpit voice ...

The black box from the military helicopter that crashed into a passenger jet over Washington DC has been recovered, transport safety chiefs have said. The flight recorder contains voice recordings of ...