Tech. Sgt. Brandon M. Harrist, an aircraft electrical and environmental systems craftsman assigned to the 149th Maintenance Squadron, Texas Air National Guard with DDexter, a military working dog in training, which he is fostering as part of the Department of Defense?s Military Working Dog Breeding Program, at Joint Base San Antonio ? Lackland, Texas, Nov. 20, 2014. Harrist is a member of the 149th Fighter Wing, Texas Air National Guard, which is headquartered at JBSA-Lackland. (U.S. Air National Guard photo by Senior Master Sgt. Miguel Arellano / Released)