U.S. Air Force Airman 1st Class Jacob Boer, 1st Maintenance Squadron non-destructive inspection journeyman, loads oil into a SpectrOil M machine at Joint Base Langley-Eustis, Virginia, Feb. 15, 2019. Boer attended a training course led by NDI career leaders who travel nationwide in an effort to revitalize NDI readiness. (U.S. Air Force photo by Airman 1st Class Monica Roybal)