The fluorescent frontier of inspection

A U.S. Air Force 92nd Maintenance Squadron nondestructive inspection Airmen sprays magnetic particles on a copper bar at Fairchild Air Force Base, Washington, June 12, 2025. Magnetic particles acted as visual indicators of magnetic field leakage by accumulating at flaw locations on equipment, making them visible. (U.S. Air Force photo by Senior Airman Morgan St Marks)