Secretary of the Air Force Heather Wilson coins Capt. Kevin Liu, 961st Airborne Air Control Squadron project officer, Feb. 2, 2018, at Kadena Air Base, Japan. Challenge coins are a military tradition in which a senior military leader or a member of a distinguished office acknowledges the awards, accomplishments or significant acts of a particular service member. ( Air Force

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Size: 1730px × 1155px
Photo credit: © RP Photo / Alamy / Afripics
License: Licensed
Model Released: No

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