Marines from Marine Forces Reserve receive directions and coordinates for their objective during a chemical, biological, radiological and nuclear defense training simulation aboard Naval Air Station Joint Reserve Base New Orleans, Feb. 5, 2015. Marines kept a constant communication between teams and the control center to locate the precise source of a toxic contamination. The CBRN defense training equips Marines from diverse units, with the proper knowledge and readiness needed to handle a real combat zone situation. (U.S. Marine Corps photo by Lance Cpl. Ian Ferro)