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Senior Master Sgt. Robert Bertsch, an Air Force Reserve loadmaster assigned to the 728th Airlift Squadron, Joint Base Lewis-McChord, Wash., flips cargo rails rollers on a C-17 Globemaster III to prepare the aircraft for a cargo upload during a local sortie mission here on April 27, 2020. (Air Force photo by Maj Candice Allen)
18.0-200.0 mm f/3.5-5.6
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