What is a black box on a plane? What to know after AA Flight 5342 crash with helicopter
What is a black box, what can it tell us, and have the data recorders been found from Flight 5342 and the Army's Blackhawk?
Black boxes recovered from plane crash in Washington DC. Here's what they can reveal
Investigators have recovered the so-called black boxes from an American Airlines Bombardier CRJ-700 regional jet, which collided with a U.S. Army UH-60 Black Hawk helicopter and crashed into the ...