Airman 1st Class Justin Hollis, 28th Aircraft Maintenance Squadron B-1 crew chief, lubricates landing gear after an aircraft wash during an Operational Readiness Exercise at Ellsworth Air Force Base, S.D., March 20, 2013. The wash removes lubrication that must be reapplied to reduce friction and keep Airmen and aircrafts safe. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)