U.S. Air Force Tech. Sgt. Jim Gargano, 509th Maintenance Squadron metals technology assistant section chief, welds a connector of a B-2 Spirit Bomber tail pipe liner, Mar. 6, 2013 at Whiteman Air Force Base, Mo. The equipment technicians use includes welders, grinders, mills and lathes. (U.S. Air Force photo/Staff Sgt. Alexandra M. Boutte)

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