U.S. Air Force Airman 1st Class Austin Santrock, 325th Maintenance Squadron nondestructive inspection apprentice, tests an oil sample at Tyndall Air Force Base, Florida, June 14, 2022. Airmen trained in the NDI flight utilize specific equipment to test oil and fuels samples to ensure and the substance is not contaminated and safe to use on the job. (U.S. Air Force photo by Staff Sgt. Magen M. Reeves)