U.S. Air Force Airman 1st Class Lacy Weeks, 1st Maintenance Squadron non-destructive inspection technician, inspects an aircraft part under black light at Joint Base Langley-Eustis, Va., May 4, 2017. The technicians use tools including X-ray, magnetic, chemical and black light systems to check for destructive faults in parts and equipment. (U.S. Air Force photo/Staff Sgt. Natasha Stannard)