ELLSWORTH AIR FORCE BASE, S.D. – Staff Sgt Santana Brown, 28th Civil Engineer Squadron structures specialist, listens to area updates over a radio while providing security during a Phase II Operational Readiness Inspection, Oct. 15. The 28th CES’s dual mission is to provide quality home-station engineer services for rapid, decisive, sustainable combat support, anytime-anywhere. (U.S. Air Force photo/Staff Sgt. Marc I. Lane)