SUNSET TRAINING U.S. Marines carry a simulated casualty towards a CH-46E Sea Knight helicopter during a joint mass casualty training exercise near Camp Lemonier in Grand Bara, Djibouti, May 20, 2009. The Marines, assigned to the 13th Marine Expeditionary Unit, trained with the 82nd Expeditionary Rescue Squadron during the day-long exercise. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 728033-Q-OBS07-020.jpg Photo Gallery