U.S. Army Spc. Brandon Ward, 3rd Military Police Detachment explosives canine handler, hides a mock explosive during a week-long explosive detection certification course at Fort Eustis, Va., Aug. 31, 2015. The course aimed to ensure contracted explosives detection canines and handlers met military standards. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)