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Jason Smith, 512th Maintenance Squadron floor chief, checks the oil on a diesel motor that provides power to the maintenance stands in the isochronal dock Dec. 2, 2015, at Dover Air Force Base, Del. Smith has been performing isochronal inspections for more than 27 years and has worked on every C-5 flying in the Air Force today. (U.S. Air Force photo/Senior Airman William Johnson)
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