Amid the glow of lights on the flightline in the early morning, 28th Aircraft Maintenance Squadron crew chiefs repair a B-1 bomber radome during an Operational Readiness Exercise at Ellsworth Air Force Base, S.D., March 15, 2012. The exercise tested the base’s ability to rapidly mobilize and process assets during a simulated contingency tasking. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)