Master Sgt. Corey Brown, Air Crew Flight Equipment, takes the Master Sgt. Oath during his promotion to Master Sgt. Feb. 1, 2020 at the 155th Air Refueling Wing, Lincoln, Nebraska. ( Air Force photo by Tech. Sgt. Jason Wilson)
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Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
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