A key safety system was turned off on the U.S. Army helicopter that collided with an American Airlines regional jet last week near Washington's Reagan Airport, killing 67.

Fort Belvoir on a routine training flight and never came home. These soldiers knew the risk when they put on the uniform. In fact, two of them experienced combat overseas. Sadly, their deaths just prove the danger service members face every day.

Family and friends remember victims of the collision between American Eagle Flight 5342 and an Army helicopter near Reagan National Airport.

More information has emerged in the investigation into the mid-air collision over the Potomac River between an American Airlines jet and an Army Black Hawk helicopter,

The Army helicopter that collided with a passenger plane above the Potomac River boasted an experienced crew doing “an unforgiving job.” Friends and relatives are still baffled and mourning their loss.

The U.S. Army helicopter that collided with an passenger jet near Washington, D.C., had an advanced surveillance system turned off.

The black hawk helicopter involved in the deadly collision with an American Airlines jet over Washington, D.C. has a crucial safety system turned off at the time.