ELLSWORTH AIR FORCE BASE, S.D. - 28th Civil Engineer Airmen trace out plans to construct an entry control gate at Camp Lancer during a Phase II Operational Readiness Inspection, Oct. 14. Airmen with the 28 CES sharpen their skills by constructing defensive measures around their encampment. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)