Marine Corps Lt. Gen. Michael G. Dana, left, assistant deputy commandant, Logistics, presents a certificate to Col. Mark R. Hollahan, head of Equal Opportunity and Diversity Branch, Manpower Management Records and Performance, during his retirement ceremony at The Clubs at Quantico, Marine Corps Base Quantico, Va., June 29, 2018. Hollahan served 30 years of honorable and faithful military service.

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