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),

Runway operations at the airport are expected to resume at 11 a.m. "The NTSB will lead the investigation. We are working with local officials and will provide any additional information once it becomes available," McLendon said. A source briefed on the search-and-rescue operation described a gruesome scene with large numbers of bodies recovered.