Here's what we know about Ryan Austin O'Hara, one of the soldiers aboard the helicopter presumed dead in Wednesday's crash.

Sixty passengers and four crew members from the plane and three Black Hawk helicopter personnel are feared dead as a recovery mission is underway.

The investigation into the deadly crash near Washington, D.C. is ongoing. Former Army Black Hawk pilot and senior director for the FDD's Center on Military & Political Power Bradley Bowman joins Katy Tur to share his expertise and insight on the route taken by the helicopter.