US Navy (USN) Hospital Corpsman Second Class (HM2) Ronald Bayaco, Medical Treatment Facility, US Military Sealift Command (MSC) Mercy Class Hospital Ship USNS MERCY (T-AH 19), prepares the computer, before giving a Computerized Axial Tomogragphy (CAT) scan to a patient, during a humanitarian assistance mission.(U.S. Navy photo by CHIEF Mass Communication SPECIALIST Don Bray) (Released)

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