U.S. Marine Corps Lance Cpl. Michael A. Kelley, left, dumps a shovel of sand into a sandbag held by Lance Cpl. William I. Holdsworth while preparing their fighting position for the “hold” portion during Enhanced Mojave Viper, an exercise on Marine Corps Air Ground Combat Center, Twentynine Palms, Calf., Sept. 27, 2009. Both are assigned to Bravo Company, 1st Battalion, 3rd Marine Regiment. U.S. Marine Corps Lance Cpl. Michael A. Kelley, left, dumps a shovel of sand into a sandbag held by Lance Cpl. William I. Holdsworth while preparing their fighting position for the “hold” portion during Enhanced Mojave Viper, an exercise on Marine Corps Air Ground Combat Center, Twentynine Palms, Calf., Sept. 27, 2009. Both are assigned to Bravo Company, 1st Battalion, 3rd Marine Regiment. SHARE: Download: Full Size (0.79 MB) Tags: Photo Essays Credit: VIRIN: 959391-T-NCC34-624.jpg Photo Gallery