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Staff Sgt. James Davidson, 127th Logistics Readiness Squadron, vehicle maintenance operator, uses a laser engraving machine to etch a specific code onto various tools in the LRS shop in the vehicle maintenance facility at Selfridge Air National Guard Base, Mich., Nov. 7, 2015. The code on the tools is specific to Selfridge, if a part is located outside of the base it can easily be returned by using the code. (U.S. Air National Guard photo by Senior Airman Ryan Zeski/Released)
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