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

Authorities say they have identified all but one of the victims of the deadly collision that happened on January 29.

Remains from all 67 people killed D.C. midair collision recovered, most identified 02:21. Remains from all 67 victims of the midair collision over Washington, D.C., that sent an A

More than a week after the horrific helicopter-plane collision near Washington, salvage crews have recovered most of the wreckage.