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.

The collision of a U.S. Army helicopter and an American Airlines plane over Washington D.C. has left many people stunned.

The service is often responsible for ferrying lawmakers and other V.I.P.’s across the area, and near Reagan National Airport.

An Army Black Hawk helicopter collided with a regional jet near Ronald Reagan Washington National Airport on Wednesday evening, U.S. officials confirmed to ABC News.

A regional jet carrying 60 passengers and four crew members collided with a military helicopter on Wednesday night as it approached Washington Reagan National Airport. The flight was en route from ...

Chief John Donnelly, DC Fire and EMS said the mission has switched from a rescue to a recovery. They have recovered 27 bodies ...

The midair crash in Washington D.C. is having ripple effects across the country. A Colonel and pilot at the Papago Park Military Reservation in Phoenix is talking about how they keep safe in the air ...

An accident typically is a series of many small things that line up at the same time”, says retired helicopter pilot and flight instructor Don Pope. Pope said there can be many difficulties when ...

A solider involved in the American Airlines jet that collided with an Army helicopter has ties to Gwinnett County.Ryan O’Hara ...