Tech. Sgt. Tyler Williams, 445th Maintenance Squadron, aircraft metals technician, operates an engraving machine at the fabrications and metal technologies shop Aug. 4, 2019. Airmen here make parts not currently produced or available to assist the maintenance mission. The shop provides structural maintenance and repairs for the C-17 Globemaster III. (U.S. Air Force photo/Master Sgt. Patrick O’Reilly)