Lance Cpl. Alex Cruz (right), chemical, biological, radiological and nuclear defense specialist with 4th Reconnaissance Battalion, 4th Marine Division, and Lance Cpl. Cameron M. Dale (left), CBRN specialist with Marine Aircraft Group 41, 4th Marine Aircraft Wing, enter a building filled with simulated anhydrous ammonia gas as part of a CBRN reconnaissance team during a training event at Camp Shelby, Miss., Nov. 17, 2015. Marines from across Marine Forces Reserve conducted CBRN training scenarios as part of a week-long Advanced Consequence Management course. (U.S. Marine Corps photo by Cpl. Ian Leones/Released)