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180905-F-YT646-2006
Master Sgt. James Mattingly, sitting, 361st Training Squadron aircrafts metals technology instructor, performs a demonstration for his students at Sheppard Air Force Base, Texas, Sept. 5, 2018. Mattingly is performing a Tungsten Inert Gas Welding demo, which is done by heating up a thin piece of Tungsten which Mattingly uses as some sort of flaming pencil to write/weld patterns onto the pieces of metal. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)

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Photo by: Airman 1st Class Pedro Tenorio |  VIRIN: 180905-F-YT646-2006.JPG