Senior Airman Roderick Johnson, 49th Maintenance Squadron non-destructive inspection technician, prepares a metal bracket for inspection by dipping it in a penetrant at Holloman Air Force Base, N.M., June 30. The item is dipped in a very low viscosity penetrant which fills any voids left by cracks or damage and indicates a need for repair. NDI technicians are able to assist aircraft maintainers by identifying damage to aircraft parts in a non-destructive manner, allowing them to ensure military aviation equipment safety. (U.S. Air Force photo by Airman 1st Class Aaron Montoya / Released)
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