Staff Sgt. Jessie Johnson practices placement training with her military working dog, Chrach, April 24, 2013, at Forward Operation Base Pasab, Afghanistan. Chrach is trained to detect the odor of explosives. Johnson, a native of Reading, Pa., has been a MWD handler for four years and is deployed with the 3rd Infrantry Division. (U.S. Air Force photo/Staff Sgt. Marleah Miller)