Senior Airman Jeremy Evans, a precision measurement equipment laboratory (PMEL) journeyman assigned to the 4th Component Maintenance Squadron at Seymour Johnson Air Force Base (AFB), North Carolina, explains the procedures outlined in the unit operating instructions for a Rapid Assistance Support for Calibration unit to Paul Hamel, 55th Maintenance Squadron PMEL site manager, May 6, 2019, at Offutt Air Force Base, Nebraska. The PMEL shop here is responsible for the repair and calibration of 6,000 pieces of Test Measurement Diagnostic Equipment that support the 55 Wing’s mission. (U.S. Air Force photo by L. Cunningham)