Grim, 379th Expeditionary Security Forces Squadron military working dog, stands by as he listens to his handler’s commands during training Sept. 15, 2016, at Al Udeid Air Base, Qatar. Handlers train their assigned MWD daily to maintain their basic level of proficiency and advance their skills. The MWDs are exposed to new tasks regularly as training tools and techniques evolve. (U.S. Air Force photo/Senior Airman Janelle Patiño/Released)