Airman 1st Class Thomas Tangedal, 22nd Maintenance Squadron metals technician, welds a certification tube, June 11, 2014, at McConnell Air Force Base, Kan. The tube must pass a nondestructive inspection after being welded in order for the welder to receive their job certification. (U.S. Air Force photo/Airman 1st Class Colby Hardin)
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