Marines from Marine Forces Reserve used Joint Chemical Agent Detectors to detect and identify chemical agents during a chemical, biological, radiological and nuclear defense training simulation aboard Naval Air Station Joint Reserve Base New Orleans, Feb. 5, 2015. The JCAD is a vital piece of equipment for CBRN Marines. It detects, identifies and shows the density of chemical agents in their vapor form. 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)