A U.S. Marine with Marine Wing Communications Squadron 48, Marine Air Control Group 48, 4th Marine Aircraft Wing, participates in gas chamber training at Joliet Army Training Area, Elwood, Ill., July 15, 2019. MWCS-48 is conducting exercises ranging from rifle and pistol qualifications to land navigation to meet annual training requirements, as well as increase occupational proficiency. (U.S. Marine Corps photo by Lance Cpl. Preston L. Morris)