Conventional maintenance crew members assigned to the 28th Munitions Squadron assemble and load inert GBU-31V munitions during an Operational Readiness Exercise at Ellsworth Air Force Base, S.D., Feb. 22, 2012. The 28th MUNS Airmen are responsible for 1,707 munitions line items, 86 facilities and a 647-acre munitions storage area to support B-1 bomber operations. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)