Lance Cpl. Barney Oldfield, a rifleman with Jump Platoon, Headquarters and Service Company, 3rd Battalion, 3rd Marine Regiment, uses a bottle cap to mark the location of a metal object during metal detector training on Camp Dwyer, Afghanistan, Nov. 3, 2011. After departing home in Hawaii from Oct. 27 through Nov. 1, the Marines and sailors of “America’s Battalion” arrived in Afghanistan’s Helmand province to begin their seven-month deployment in support of Regimental Combat Team 5. They are filtering into the province’s Garmsir District to relieve fellow Hawaii-based 1st Battalion, 3rd Marine Regiment, who arrived here in April. Oldfield, 23, is from Longmont, Colo. (Official U.S. Marine Corps photo by Cpl. Reece Lodder / RELEASED) - Lance Cpl. Barney Oldfield, a rifleman with Jump Platoon, Headquarters and Service Company, 3rd Battalion, 3rd Marine Regiment, uses a bottle cap to mark the location of a metal object during metal detector training on Camp Dwyer, Afghanistan, Nov. 3, 2011. After departing home in Hawaii from Oct. 27 through Nov. 1, the Marines and sailors of “America’s Battalion” arrived in Afghanistan’s Helmand province to begin their seven-month deployment in support of Regimental Combat Team 5. They are filtering into the province’s Garmsir District to relieve fellow Hawaii-based 1st Battalion, 3rd Marine Regiment, who arrived here in April. Oldfield, 23, is from Longmont, Colo. (Official U.S. Marine Corps photo by Cpl. Reece Lodder / RELEASED)