Newly released data from ground-based radar came out Tuesday suggesting an Army helicopter was higher than it was supposed to ...

Investigators revealed that the U.S. Army Black Hawk helicopter that collided with American Airlines Flight 5342 was flying ...

This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's ...

The military helicopter that collided with an American Airlines flight over Washington, DC, was flying nearly twice as high ...

Victims' families gathered near the site where a plane and copter collided and fell into the Potomac River. 'They are all ...

Dominic Nicholls, who flew helicopters for the British Army, explains how airspace is usually controlled to avoid accidents ...