Airman 1st Class Justin Hollis, 28th Aircraft Maintenance Squadron B-1 crew chief, consults his technical order before lubricating parts of a B-1 after it was washed during an Operational Readiness Exercise at Ellsworth Air Force Base, S.D., March 20, 2013. OREs ensure Ellsworth Airmen maintain their combat-ready edge, and are ready to deploy rapidly in the event of real-world contingencies. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)