Preliminary flight data from the deadly plane crash near Reagan National Airport in Washington, D.C., shows conflicting ...

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

This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's worst air disaster in more than a decade, aviation experts said.

A devastating mid-air collision between a commercial airliner and a U.S. Army helicopter sent both aircraft crashing into ...