U.S. Army Spc. Roxanne Cavezuela, 3rd Military Police Detachment military working dog handler, conducts obedience training with her dog, MWD Chek, a patrol explosives detector dog, during a demonstration for Canadian Air Cadets from the 180th Mosquito Squadron at Fort Eustis, Va., March 12, 2014. The obstacles used in the demonstration mimic environments the dogs may encounter in real life situations, such as jumping through a window. (U.S. Air Force photo by Staff Sgt. Katie Gar Ward/Released)