U.S. Army Pvt. Levi Graham, 3rd Military Police Detachment military working dog handler, prepares to release, Mery, 3rd MPD military working dog, during decoy development and bite-building training at Joint Base Langley-Eustis, Va., July 26, 2017. During training, the units focused highly on the safety of the handlers, trainers, dogs and even perpetrators. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)