Investigators continue salvage operations in deadly Washington air crash
Police boats returned to Washington's Potomac River on Friday in an effort to remove the remains of a midair collision that killed 67 people in the United States' deadliest aviation disaster in two decades.

Police boats returned to Washington's Potomac River on Friday in an effort to remove the remains of a midair collision that killed 67 people in the United States' deadliest aviation disaster in two decades.