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141103-F-VN235-230
Airman 1st Class Michael Griffin utilizes a stationary penetrant line Nov. 3, 2014, at Langley Air Force Base, Va. A penetrant is used to detect discontinuities, such as cracks and pits, open to the surface on parts made of nonporous materials. Griffin is a 1st Maintenance Squadron nondestructive inspection technician. (U.S. Air Force photo/Staff Sgt. Antoinette Gibson)

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Photo by: Staff Sgt. Antoinette Gibson |  VIRIN: 141103-F-VN235-230.JPG