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?
Washington plane crash: Black box recovered from Black Hawk helicopter as 41 bodies pulled from Potomac river
Black box recovered from Black Hawk helicopter as 41 bodies pulled from Potomac river - Questions grow about air safety in ...