U.S. Army chaplain Carl Subler reads under the glow of his red-filtered head lamp early on March 5, 2010 at a a combat outpost in Sha-Wali-Kot in Kandahar province in southern Afghanistan. Soldiers in combat zones are often forbidden from using 'white' light at night, in order to avoid detection by enemy insurgents. The Catholic priest was reading I Am America (And So Can You) by Stephen Colbert. Military chaplains, who travel the battlefield across Afghanistan, provide a backbone of support for thousands of soldiers struggling with the difficulties of war and year-long deployments away from home. By John Moore/Getty Images.