Not your average gas chamber training - U.S. Marines from various units participate in a five-day Chemical Biological Radiological and Nuclear (CBRN) reconnaissance surveillance decontamination course lead by Sgt. Bruce Luu, CBRN specialist, I Marine Expeditionary Force (MEF) Support Battalion, I MEF Information Group, I MEF on Marine Corps Base Camp Pendleton, May 13, 2019. The course certified any individual Marine outside of the CBRN occupational field to be qualified to handle a CBRN situation or environment.