Spc. Robert Carlson, U.S. Army, keeps a sharp eye on his surroundings. Spc. Robert Carlson, U.S. Army, keeps a sharp eye on his surroundings as he provides security for his fellow soldiers during a patrol in Mosul, Iraq, on Feb. 5, 2006. Carlson is attached to Alpha Company, 1st Battalion, 172nd Stryker Brigade, 17th Infantry Regiment. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 753441-G-LZD13-378.jpg Photo Gallery