It’s one of the most important pieces of forensic evidence following a plane crash: The so-called “black box.”
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There are actually two of these remarkably sturdy devices: the cockpit voice recorder and the flight data recorder. And they’re typically orange, not black.
Federal investigators on Friday recovered the black boxes from the passenger jet that crashed in the Potomac River just outside Washington on Wednesday, while authorities were still searching for similar devices in the military helicopter that also went down.
One…