A B-1 bomber takes off from Ellsworth Air Force Base, S.D., during an Operational Readiness Exercise on Feb. 23, 2012. The ORE tested a variety of B-1B operations, including aircraft maintenance and support functions, ensuring the base is ready and able to mobilize and process assets when tasked. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)