 US Marines, Executor Short Distance Live Fire Range, Under Chemical, Biological, Radiological and Nuclear Conditions, At Camp Hanson, Okinawa, Japan. CBRN Defense, is responsible for conducting training and reconnaissance, chemical detection identification, biological agent collection and sampling, decontamination of personnel, equipment and casualties and, individual protective measures in first aid for unit personnel. The Marines are with Headquarters Battalion, 3D Marine Division.