U.S. Marines with Combat Logistics Battalion 1, 1st Marine Logistics Group conduct a Reconnaissance Surveillance and Decontamination course (RSD) ran by the Marines of Chemical Biological Radiation and Nuclear (CBRN), Combat Logistics Regiment 17, 1st Marine Logistics Group aboard Camp Pendleton, Calif., February 13, 2014. The Marines received training on conducting reconnaissance and identifying potential CBRN threats, while operating equipment in stressful environments to ensure Marines do not become casualties.