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Chemical, biochemical, radiological and nuclear defense specialists with the 31st Marine Expeditionary Unit, and Royal Thai Navy Sailors scan a simulated noncombatant evacuee during a noncombatant evacuation operation as part of Exercise Cobra Gold 2020 at Utapao, Kingdom of Thailand, Feb. 29, 2020. Exercise Cobra Gold 20 is the largest theater security cooperation exercise in the Indo-Pacific region and is an integral part of the U.S. commitment to strengthen engagement in the region.