U.S. Marine Corps Lance Cpl. Korey Miller, assigned to 3rd Battalion, 4th Marines, conducts a functions check after mounting a crew served weapons system on a Mine Resistant Ambush Protected vehicle in preparation for a joint operation with the Afghan National Civil Order Police on forward operating base Zeebruge, Kajaki District, Helmand province, Afghanistan, April 27, 2013. Preventative maintenance and operational checks are conducted prior to every operation. (U.S. Marine Corps photo by Cpl. Trent A. Randolph/Released)