U.S. Marines and Vietnamese emergency responders carry a mock casualty to receive medical care while participating in a search, rescue and oil spill response field training exercise during Pacific Partnership 2017 in Da Nang, Vietnam, May 13, 2017. The Marines are assigned to the 9th Engineer Support Battalion. Pacific Partnership is the largest annual multilateral humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Asia-Pacific and aims to enhance regional coordination in areas such as medical readiness and preparedness for manmade and natural disasters. Navy photo by Petty Officer 2nd Class Joshua Fulton