A U.S. Marine carries ammunition for an M-2 .50 caliber machine gun. A U.S. Marine with 5th Battalion, 10th Marine Regiment, carries ammunition for an M-2 .50 caliber machine gun at Twentynine Palms, Calif., on Jan. 25, 2009. Marines with the 5th Battalion are participating in Exercise Mojave Viper in preparation for their deployment to Afghanistan in support of Operation Enduring Freedom. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 293473-M-XXR99-115.jpg Photo Gallery