Marines line up to purchase items from Sgt. Arthur Doers, a native of Iron Mountain, Mich., and Marine Corps Community Services Marine with Combat Logistics Regiment 2, Regional Command (Southwest), at a forward operating base in Helmand province, Afghanistan, Aug. 4, 2013. Doers provided access to a mobile Post Exchange, which sold various hygiene, uniform and food commodities rarely seen by servicemembers operating at the isolated base.