The black box will tell us everything. The black box will explain why 300 people died. The black box contains the flight data recorder. It also contains a cockpit voice recorder. The flight data recorder tells us if an engine blew up, or the fuel tanks were empty, or whatever, and the voice recorder tells us if the pilot and co-pilot were arguing over whose turn it was to steer.
People love the black box.
An airplane crashes. Three hundred people are dead. Thousands of people are stricken with grief. The black box will tell us. The black box will save us.