ELLSWORTH AIR FORCE BASE, S.D.- (Front) Senior Airman Jennifer Peterson and Staff Sgt. Jeremiah Phelps prepare to move two trailers of Mark 84 bombs, April 21. The bombs are being moved and warehoused inside a hardened structure. Both Airmen are assigned to the 28th Munitions Squadron as conventional maintenance crew chiefs. (U.S. Air Force photo/Airman 1st Class Corey Hook)