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A U.S. Air Force Airman from the 909th Aircraft Maintenance Unit inspects a bolt on the wing of a KC-135 Stratotanker aerial refueling aircraft on Kadena Air Base, Japan, Aug. 12, 2013. For seemingly endless hours each day under the hot Okinawan sun, maintainers from the 909th Aircraft Maintenance Unit inspect, bolt, grease and polish an assortment of parts and pieces to ensure each and every mission goes off without a hitch. (U.S. Air Force picture story by Senior Airman Maeson L. Elleman/Released)