Airman 1st Class David Heller, 28th Munitions Squadron equipment support technician, updates bench stock items on an inventory list at the equipment maintenance shop on Ellsworth Air Force Base, S.D., Aug. 20, 2013. Technicians use this list to ensure all 230 bench stock items are on hand in order to maintain all support and munitions trailers. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle)