U.S. Air Force 20th Component Maintenance Squadron (CMS) Precision Measurement Equipment Laboratory (PMEL) Airmen smile as they receive a certificate of acceptable standards at Shaw Air Force Base, South Carolina, Dec. 5, 2019. Airmen renovated the 20th CMS PMEL and helped bring in new equipment, leading to their certification. (U.S. Air Force photo by Airman 1st Class Kaitlyn Brewer)