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 box from Connecticut-made Sikorsky Black Hawk helicopter found at D.C. crash site, AP says
The black box from a Connecticut-made Sikorsky Black Hawk helicopter involved in a deadly plane crash Wednesday is now at ...