U.S. Marine Staff Sgt. Philip Barnes helps a student

U.S. Marine Staff Sgt. Philip Barnes helps a student take off their Mission Oriented Protective Posture suit as part of the Reconnaissance, Surveillance and Decontamination training aboard Marine Corps Base Camp Pendleton, Calif., April 26, 2017. The purpose of this training is to accomplish missions within a chemical, biological, radiological and nuclear environment. Barnes is the CBRN chief for 1st Maintenance Battalion, 1st Marine Logistics Group. (U.S. Marine Corps photo by Lance Corporal Salmineo Sherman Jr./Released)