U.S. Air Force Staff Sgt. Josiah Sorrels, 8th Civil Engineer Squadron lock shop noncommissioned officer in charge, cuts a copy of a key using a punch at Kunsan Air Base, Republic of Korea, June 22, 2018. Maintaining locks and creating new keys are part of the day to day operations the structures shop is responsible for. (U.S. Air Force photo by Tech. Sgt. Charles McNamara)