Army UH-60 Black Hawk helicopter was on a 'proficiency training flight'
Military spokesman Ron McLendon II said the Army is joining an investigation into the crash headed by the National Transportation Security Board.
NBC Chicago18d
What are Black Hawk helicopters and how are they used? What to know after the DC aircraft crash
The helicopter is a “utility tactical transport” aircraft ... a key part of its fleet for the next three decades. The Black Hawk that collided with American Eagle Flight 5342 was from ...