Preliminary data from the deadliest U.S. aviation accident in nearly 25 years showed conflicting readings about the altitudes of an airliner and Army helicopter when they collided near Washington.

As many as 60 passengers and four crew members were aboard American Eagle Flight 5342, and the Black Hawk helicopter was ...

Transportation safety investigators are seeking to determine if the pilots of the American Airlines plane detected danger ...

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

There were 64 passengers aboard the plane, and three Army soldiers in the helicopter, according to officials. Here's a look ...

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

But even before the National Transportation Safety Board completes its investigation—a neurotically thorough process that ...