U.S. Marine Corps Sgt. Rush, a military working dog, searches for explosives during a patrol near Patrol Base Boldak in Helmand province, Afghanistan, Jan. 30, 2014. U.S. Marine Corps photo by Lance Cpl. Zachery B. Martin.
A U.S. Marine and his military working dog take a break during a patrol near Patrol Base Boldak in Helmand province, Afghanistan, Jan. 30, 2014. U.S. Marine Corps photo by Lance Cpl. Zachery B. Martin.