February 14, 2011, U.S. Marines with the Chemical Biological Radiological Nuclear high-yield Explosive (CBRNE) detachment, 31st Marine Expeditionary Unit (MEU), 3rd Marine Expeditionary Brigade (MEB), observe two Royal Thai Navy Sailors conduct a mock chemical contamination drill in Samesan, Kingdom of Thailand, for Exercise Cobra Gold 2011. For three decades, Thailand has hosted Cobra Gold, one of the largest land-based, joint, combined military training exercises in the world. A successful Cobra Gold 2011 results in increased operational readiness of U.S. and Thai forces and matured military to military relations between the two countries. - February 14, 2011, U.S. Marines with the Chemical Biological Radiological Nuclear high-yield Explosive (CBRNE) detachment, 31st Marine Expeditionary Unit (MEU), 3rd Marine Expeditionary Brigade (MEB), observe two Royal Thai Navy Sailors conduct a mock chemical contamination drill in Samesan, Kingdom of Thailand, for Exercise Cobra Gold 2011. For three decades, Thailand has hosted Cobra Gold, one of the largest land-based, joint, combined military training exercises in the world. A successful Cobra Gold 2011 results in increased operational readiness of U.S. and Thai forces and matured military to military relations between the two countries.