A Navy corpsman with Combat Logistic Battalion (CLB) 31, 31st Marine Expeditionary Unit (MEU), inserts an intravenous therapy into a simulated combat casualty during a nightingale exercise at Camp Hansen, Okinawa, Japan. - A Navy corpsman inserts an intravenous therapy into a simulated combat casualty during a nightingale exercise at Camp Hansen, Okinawa, Japan, July 29.