U.S. Air Force Staff Sgt. Whitni Levering, 42nd Electronic Combat Squadron airborne linguist, is dragged through the water by other Airmen during a water survival training refresher course at Davis-Monthan Air Force Base, Ariz., Jan. 5, 2015. The drag is intended to acclimate aircrew members to the similar sensations of landing in water with a deployed parachute. (U.S. Air Force photo by Airman 1st Class Chris Drzazgowski/Released)