Chemical, Biological, Radiological and Nuclear defense specialists with the 31st Marine Expeditionary Unit conducted a decontamination exercise alongside Thai Marines and Air Force personnel as part of Cobra Gold 2012. The scenario simulated a chemical attack on Thai forces, requiring casualty evacuation and decontamination by the combined forces. U.S. Marines and Navy Corpsmen provided treatment to non-ambulatory casualties while Thai forces administered decontamination to all ambulatory forces.