Corporal Matthew Villalba, a chemical, biological, radiological and nuclear defense specialist with Headquarters Regiment, 2nd Marine Logistics Group, discusses defense procedures of a CBRN attack during a CBRN decontamination course aboard Camp Lejeune, N.C., March 3, 2015. Students attending the week-long course learned a variety of CBRN defense and decontamination procedures to provide assistance in the event of a CBRN attack or disaster.