Senior Master Sgt. Eduardo Betran, maintenance superintendent at the 801st Special Operations Aircraft Maintenance Squadron, is congratulated on his selection to chief master sergeant at Hurlburt Field, Fla., Dec. 17, 2015. Chief master sergeant is the highest enlisted rank, making up 1 percent of the enlisted Air Force. ( Air Force photo by Senior Airman Jeff Parkinson)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: chief, promote, release