Oregon Air National Guard Staff Sgt. Chris Mansfield, a crew chief assigned to the 142nd Fighter Wing, prepares to pull the calks on an F-15 Eagle prior to a morning sortie at Nellis Air Force Base, Nev., in support of the Weapons Instructor Course, June 1, 2017

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Photo credit: © Dudley Little / Alamy / Afripics
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Keywords: air, america, archive, armed, army, defence, force, forces, military, navy, reportage, service, serviceman, servicemen, soldier, states, united, usa