U.S. Marine Chemical, Biological, Radiological, and Nuclear (CBRN) defense specialists with 2nd Marine Logistics Group conduct training on Camp Lejeune, N.C., July 2, 2014. Their primary responsibility is to ensure their unit is trained and ready to survive and operate in a CBRN environment. (U.S. Marine Corps photo by Sgt. Anthony L. Ortiz / Released)