Investigators say they've recovered all of the wreckage from a deadly mid-air collision between an American Airlines plane and an army Black Hawk helicopter over Washington, D.C. The National Transportation Safety Board released a new video of crews salvaging the mangled pieces of the black hawk from the Potomac River.

Investigators with the National Transportation Safety Board (NTSB) are examining the wreckage after an American Airlines plane and Black Hawk helicopter collided midair near Reagan National Airport (DCA),