Massive steel rods secured in concrete footings are capped with large nuts as they wait to secure steel columns like those recently erected in the background as the KC-46 'Pegasus' tanker maintenance hangars take shape Dec. 11, 2017, Tinker Air Force Base, Oklahoma. The specially-designed hangars will form a new maintenance campus for the Air Force's newest tanker where heavy maintenance and overhaul will be performed. ( Air Force

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Size: 1936px × 1291px
Photo credit: © Image Vault / Alamy / Afripics
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