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Cpl. Kuwyn Diggs, a semitrailer refueler operator with Detachment (-), Marine Wing Support Squadron-472, Marine Aircraft Group 49, 4th Marine Aircraft Wing, Marine Forces Reserve, performs maintenance on an AMK 970 semitrailer refueler during Innovative Readiness Training Old Harbor, Alaska, July 10, 2016. IRT Old Harbor is part of a civil and joint military program to improve military readiness while simultaneously providing quality services to underserved communities throughout the United States.