190412-F-QS178-1016
Senior Airman Jared Allen, 380th Expeditionary Maintenance Squadron Nondestructive Inspection journeyman, demonstrates the use of penetrant, April 12, 2019, on Al Dhafra Air Base, United Arab Emirates. Penetrant is applied over an area believed to have a crack; after it settles and excess is wiped clean, the penetrant glows under a black light, revealing the severity of damage. (U.S. Air Force photo by Tech. Sgt. Jocelyn A. Ford)