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Master Sgt. Juan Polanco, right, noncommissioned officer in charge of preventive medicine at Public Health Command-Pacific, briefs Warrant Officer Masanobu Murawaki, center, the sergeant major of the Japan Ground Self-Defense Force, during his visit to Camp Zama, Japan, Aug. 16, 2022. Murawaki took part in an installation tour to better understand how American and Japanese partners interact in the Cooperative Work Program.