ELLSWORTH AIR FORCE BASE, S.D. -- (Left to right) Airman 1st Class Aaron Valdez and Senior Airman Myco Wilson, 28th Munitions Squadron conventional maintenance crew members, take apart their tools after securing an aerosurface assembly on an inert Guided Bomb Unit-31, Dec. 8. The aerosurface assembly is designed to stabilize the GBU-31. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)