Black Hawk pilots may have missed key instruction from tower before crash: NTSB
The NTSB gave an update on its investigation into the Potomac River crash between an American Airlines jet and an Army helicopter in January.
See inside Marine One, the soundproof presidential helicopter that can seat 14 people and deploy anti-missile defenses
With a landing zone on the White House lawn, Marine One is often the most convenient way for presidents to get from place to ...