As investigators try to uncover what happened when an airplane and a helicopter collided over the Potomac River, here is the latest information.

A deadly collision on Wednesday night between an American Airlines plane with 60 passengers and four crew members and an Army UH-60 Black Hawk helicopter with three soldiers remains under ...

U.S. military helicopter crashes like the one that took down a commercial American Airlines flight over the Potomac River in Washington, D.C., on Wednesday night are very rare, but there has been ...