Altimeter in Black Hawk helicopter may have malfunctioned before DCA mid-air collision - NTSB: Black Hawk was flying too high when it collided with passenger plane over Washington DC, killing 67 - Father of Black Hawk pilot killed in crash recalls learning of tragedy on news - Trump blames fatal D.C. plane crash on Black Hawk helicopter pilot - Wild theory says Black Hawk was rehearsing Trump evacuation before American Airlines crash - Washington DC plane crash: Aircraft plunges into Potomac River after colliding with Black Hawk helicopter, major emergency response, flights grounded - At least 60 people 'probably lost' in Washington DC crash between passenger plane and Black Hawk helicopter: Latest - A snowmobiler who crashed into a parked Black Hawk helicopter is awarded $3 million - Massachusetts man dies after rescue from New Hampshire hike by Black Hawk helicopter - US Army successfully launches Altius 700 drone from Black Hawk