Marines assigned to Headquarters Regiment, 1st Marine Logistics Group, assist each other in decontaminating their Mission Oriented Protective Posture gear during a Reconnaissance, Surveillance and Decontamination Course on Camp Pendleton, Calif., Jan. 11, 2018. Marines who completed the practical application were in level four MOPP gear to include boots, gloves, suit and M-40 gas mask. Marine Corps photo by Pfc. Timothy Shoemaker