U.S. Marines take cover after throwing an M67 fragmentation grenade during sustainment training at D’Arta Plage, Djibouti, Nov. 1, 2014. U.S. Marines take cover after throwing an M67 fragmentation grenade during sustainment training at D’Arta Plage, Djibouti, Nov. 1, 2014. SHARE: Download: Full Size (1.56 MB) Tags: photo essays Credit: VIRIN: 269629-E-LBS59-752.jpg Photo Gallery