BAGRAM AIR BASE, Afghanistan -- Airman 1st Class Collins Osei levels gravel before concrete is poured for a new A-10 Thunderbolt II maintenance building's driveway. Airman Osei is a civil engineer with the 455th Expeditionary Operations Group, and he is deployed from Ellsworth Air Force Base, S.D. (U.S. Air Force photo by Master Sgt. Jeff Szczechowski)