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Tech. Sgt. Brian Gregory, 141st Maintenance Squadron non-destructive inspection technician, dips a helicopter part from a in a UH-1 Huey, into a chemical that will cause the item to glow under a black light to reveal any cracks at Fairchild Air Force Base, Wash., April 26, 2012. Through the use of specialized equipment, Gregory can identify cracks and other defects in metal that could cause catastrophic failure in flight. (U.S. Air Force photo by Airman 1st Class Taylor Curry/Released)
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