Staff Sgt. Charles Sena, a military working dog handler and Karo, a MWD, both assigned with the 35th Security Forces Squadron, stand together after finishing controlled aggression training at Misawa Air Base, Japan, Sept. 7, 2016. To be selected as a MWD, the K-9s are chosen at birth or a young age and go through their own rigorous training at Lackland Air Force Base, Texas. (U.S. Air Force photo by Airman 1st Class Sadie Colbert)