170322-M-GY456-568 SAN ANTONIO (March 22, 2017) Petty Officer 3rd Class Donnovon G. Angevine, assigned to the Military Working Dog Handlers Course, Navy Detachment Lackland, conducts dog handling controlled aggression training at Lackland Air Force Base, Texas. (U.S. Marine Corps photo by Lance Cpl. Jose Villalobosrocha/Released)