U.S. Air Force Senior Master Sgt. Christian Ruiz, 436th Aerial Port Squadron air freight superintendent, holds his certificate while standing among chief master sergeants, announcing his selection to chief master sergeant at Dover Air Force Base, Delaware, Nov. 29, 2023. Ruiz was one of 506 Airmen selected for promotion to the top enlisted rank of chief for the 23E9 promotion cycle. (U.S. Air Force photo by Roland Balik)
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