Air National Guard Senior Master Sgt. Paul Emler, a boom operator with the 121st Air Refueling Wing, Ohio, operates the boom on a KC-135 Stratotanker in the sky over Michigan July 20, 2018. Emler reached 9,000 flight hours on the mission.

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Photo credit: © Barney Low / Alamy / Afripics
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Keywords: 121st, air, airman, america, ang, archive, armed, army, defence, force, forces, guard, military, national, navy, refueling, reportage, service, serviceman, servicemen, soldier, states, united, usa, wing