Dye
U.S. Air Force Airman Nicholas Burgess, 23d Equipment Maintenance Squadron non-destructive inspection apprentice, pulls a part from penetrant liquid at Moody Air Force Base, Ga., Feb. 11, 2014. After being submerged and dried, parts are inspected under blacklight for cracks and weak spots as a form of preventative maintenance. (U.S. Air Force photo by Airman 1st Class Ryan Callaghan/Released)