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Tragedy in the sky: Black boxes found after fatal collisionBoth black boxes were underwater ... collided with a UH-60 Black Hawk helicopter just in front of the runway at Ronald Reagan Washington National Airport in Arlington. There were 64 people ...
Popularly known as "black boxes," event data recorders (EDRs) have helped investigators solve the mysteries of airplane crashes for decades. Now they've become standard in almost every new car sold.
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