U.S. Air Force Senior Airman Maverick Shuler, 380th Expeditionary Maintenance Squadron nondestructive inspection specialist, places an oil sample into the Jet Oil Analysis Program unit at Al Dhafra Air Base, United Arab Emirates, August 2, 2021. Shuler used the JOAP unit to determine the levels of different metals in the oil. (U.S. Air Force photo by Staff Sgt. Jao’Torey Johnson)