Screwdriver bits are laid out for use in the 28th Maintenance Squadron tool crib at Ellsworth Air Force Base, S.D., Sept. 11, 2018. The tool crib maintains, distributes and accounts for a multitude of tools used by Airmen in the 37th and 34th Bomb Squadrons for maintenance and repair of the base’s fleet of B-1s. (U.S. Air Force photo by Airman 1st Class Thomas Karol)