PICTURE PERFECT U.S. Army Sgt. John Davis silhouetted in a shaded area, performs a retina scan to a local Afghan citizen near Kandahar Air Field, Afghanistan, April 3, 2011. Davis is assigned to the 4th Squadron, 2nd Stryker Cavalry Regiment from Vilseck, Germany. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 394805-Y-IYJ54-637.jpg Photo Gallery