Officials say preliminary data from the midair crash between an airliner and an Army helicopter showed conflicting indications about the aircrafts’ altitudes when they collided near a Washington, D.C.

An American Airlines plane with 64 people on board collided with an Army helicopter over Washington, D.C., and crashed into ...

An American Airlines regional jet went down in the Potomac River near Ronald Reagan Washington National Airport.

A regional jet carrying 64 people collided with an Army Black Hawk helicopter. Reagan National Airport grounded all flights.