U.S. Marine Corps Lance Cpl. Justin Downing scans his area while on patrol during Exercise Clear, Hold, Build 3 at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., on Sept. 21, 2011. Downing is a mortar man with 3rd Battalion, 3rd Marine Regiment. The battalion is taking part in the Enhanced Mojave Viper training exercise, which is the final pre-deployment training event before deploying to Afghanistan Helmand province to support Operation Enduring Freedom.