OKINAWA EXERCISE A U.S. Marine corpsman shields a simulated injured Marine from the rotor wash of a CH-46E Sea Knight helicopter during a medical evacuation exercise in Central Training Area at Camp Hansen, Okinawa, Japan, Sept. 22, 2006. During the exercise, 15 corpsmen had to treat patients. SHARE: Download: Full Size (0.11 MB) Credit: VIRIN: 545938-U-RCI00-166.jpg Photo Gallery