A Washington, D.C.-area helicopter pilot says Army Black Hawk was flying published route and on appropriate radio frequency.

U.S. military helicopter crashes like the one that took down a commercial American Airlines flight on Wednesday night are ...

The military helicopter that collided with a regional jet near Ronald Reagan Washington National Airport in a crash that ...

Here's what is known about the Black Hawk and its crew that crashed into the American Airlines passenger jet over the Potomac ...

The catastrophe immediately raised questions about the close proximity in which helicopters and jetliners soar over the busy ...