Senior Master Sgt. Bernard London, 709th Airlift Squadron, clears his weapon before boarding a C-5M Super Galaxy flying to Joint Base Langley-Eustis, Va. to support a joint emergency deployment exercise, Dover Air Force Base, Del., March 18, 2017. The joint-exercise demonstrated loading and unloading procedures of personnel and equipment. (U.S. Air Force photo/ Tech. Sgt. Mercedes Crossland)