Airman 1st Class Dillion Rickman (left) and Staff Sgt. Agustin Tabita, 28th Logistics Readiness Squadron vehicle and vehicular equipment mechanics, replace an empty oil barrel with a full one during routine maintenance in the vehicle maintenance shop at Ellsworth Air Force Base, S.D., April 24, 2012. Regular maintenance ensures that all 28th Bomb Wing government vehicles operate safely, and are always ready for the mission. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)