Airman 1st Class Justin Hollis, 28th Aircraft Maintenance Squadron B-1 crew chief, reviews a technical order while performing maintenance on a B-1 during an Operational Readiness Exercise at Ellsworth Air Force, S.D., March 20, 2013. The ORE tests Ellsworth’s ability to deploy and to ensure all Airmen and equipment, are prepared for real-world contingencies. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)