Admiral Christopher W. Grady (left), Vice Chairman of the Joint Chiefs of Staff, presents his military challenge coin to Air Force Tech. Sgt. Diego Diaz, an HVAC supervisor assigned to the Air Force Technical Applications Center’s 709th Support Squadron, Patrick Space Force Base, Fla. The vice chairman visited the nuclear treaty monitoring center June 9, 2023 to learn more about how AFTAC delivers decisive advantage against enduring weapons of mass destruction threats and emerging weapon systems. (U.S. Air Force photo by Matthew S. Jurgens)
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