Army Col. David D. Coldren, Signal Officer and leader of the South Carolina National Guard's cyber initiatives, retires at a ceremony held at the Joint Forces Headquarters building in Columbia, South Carolina, July 8, 2017. Coldren began his military career in 1987, serving 2 years in the Florida National Guard, 8 years in the Indiana National Guard, culminating with 18 years in the South Carolina National Guard. ( Army National Guard photo by Sgt. Brian Calhoun)

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