Sgt. Steven D. Potts (right), a chemical, biological, radiological and nuclear warfare specialist with Combat Logistics Regiment 27, 2nd Marine Logistics Group, teaches Marines of Landing Support Company, CLR-27, 2nd MLG about the different types of CBRN threats during a training session aboard Camp Lejeune, N.C., March 28, 2012. Potts, the lead instructor for the course, and his Marines also informed the LS Co. Marines how to react if an attack happened and how to properly wear Mission-Oriented Protective Posture gear. - Sgt. Steven D. Potts (right), a chemical, biological, radiological and nuclear warfare specialist with Combat Logistics Regiment 27, 2nd Marine Logistics Group, teaches Marines of Landing Support Company, CLR-27, 2nd MLG about the different types of CBRN threats during a training session aboard Camp Lejeune, N.C., March 28, 2012. Potts, the lead instructor for the course, and his Marines also informed the LS Co. Marines how to react if an attack happened and how to properly wear Mission-Oriented Protective Posture gear.