171230-N-UD930-069 INDIAN OCEAN (Dec. 30, 2017) A group of U.S. Navy Hospital Corpsman examine a patient during a mass causality drill in a medical triage area aboard the amphibious transport dock ship USS San Diego (LPD 22). San Diego, part of the America Amphibious Ready Group, with embarked 15th Marine Expeditionary Unit, is operating in the Indo-Asia-Pacific region to strengthen partnerships and serve as a ready-response force for any type of contingency. (U.S. Navy photo by Mass Communication Specialist Seaman Dalton D. Caples /Released)