Air Force Tech. Sgt. Darel Matthews, Boom Operator, 78th Air Refueling Squadron, 514th Air Mobility Wing, performs a pre-flight check on the instruments in the air refueling operators’ station on a KC-10 Extender at Ramstein Air Base, Germany, Sept. 24, 2017. The 514th is an Air Force Reserve Command wing located at Joint Base McGuire-Dix-Lakehurst,

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Keywords: air, america, archive, armed, army, boom, chief, crew, defence, force, forces, military, navy, operator, reportage, service, serviceman, servicemen, soldier, states, united, usa