Metals technology shop: you need it, they build it
U.S. Air Force Staff Sgt. Eric Kerr, a fabrication flight metals technician with the 379th Expeditionary Maintenance Squadron, “tacks” pieces of metal together using a welder at Al Udeid Air Base, Qatar, Feb. 2, 2017. Tack-welding is used as a temporary means to hold components in the proper location, alignment, and distance apart until final welding can be completed, and is done by fusing the pieces together at a single point. (U.S. Air Force photo by Senior Airman Miles Wilson)