A U.S. Army soldier throws a smoke grenade during an air assault near the banks of the Tigris River, Bayji, Iraq, Oct. 14, 2008. A U.S. Army soldier throws a smoke grenade during an air assault near the banks of the Tigris River, Bayji, Iraq, Oct. 14, 2008. SHARE: Download: Full Size (1.8 MB) Tags: photo essays Credit: VIRIN: 416638-O-FFL18-191.jpg Photo Gallery