U.S. Air Force Airman 1st Class Aaron Haar, 52nd Maintenance Squadron non-destructive inspection apprentice, checks F-16 aircraft parts for magnetization after applying liquid penetrant at Spangdahlem Air Base, Germany, May 8, 2018. The magnetization process allows NDI to recognize if aircraft parts have defects. (U.S. Air Force photo by Airman 1st Class Jovante Johnson)