Spc. Louis Phay installs a culvert denial system. U.S. Army Spc. Louis Phay, with Alpha Company, 4th Battalion, 23rd Infantry Regiment, installs a culvert denial system along Highway 601 in the Helmand province of Afghanistan on March 6, 2010. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 231779-L-WAU80-305.jpg Photo Gallery