Last month, an American Airlines passenger jet and an Army helicopter collided as the plane prepared to land at Washington ...
A preliminary analysis of the flight data and voice recorder on board a Black Hawk helicopter leading up to the collision ...
With a landing zone on the White House lawn, Marine One is often the most convenient way for presidents to get from place to ...
NTSB says chopper also may have had wrong altitude readings just before midair crash with American Airlines jet ...