U.S. Marines assigned to Marine Wing Headquarters Squadron 2, participate in a Chemical Biological Radiological Nuclear (CBRN) defense section training exercise on Marine Corps Air Station Cherry Point, N.C., Jan. 22, 2015. CBRN Marines practiced reconnaissance and extraction scenarios designed to simulate real life situations with hazardous materials. (U.S. Marine Corps photo by Lance Cpl. Jodson B. Graves/Released)