Experts ask why Black Hawk helicopter may have been flying above allowed altitude before crash
This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's ...
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DC plane crash updates: Helicopter had advanced tracking system turned off, lawmaker says
WASHINGTON – The U.S. Army helicopter that collided with an American Airlines plane killing 67 people last week had turned off an advanced surveillance system that has been hailed for making ...
Black Hawk helicopter in D.C. plane crash had a safety system off, senator says
Army Black Hawk helicopter that collided with an American Eagle flight over the Potomac River​ late last month was flying with a safety system turned off, Sen. Ted Cruz told reporters after a briefing ...