NDI ensures minor cracks don't make big problems
U.S. Air Force Airman 1st Class Lacy Weeks, 1st Maintenance Squadron non-destructive inspection technician, operates a magnetic particle unit used to detect faults in ferromagnetic parts at Joint Base Langley-Eustis, Va., May 4, 2017. When magnetic particles are applied to aircraft parts, the poles attract particles and an indication of a defect is formed. (U.S. Air Force photo/Staff Sgt. Natasha Stannard)