U.S. Army Pfc. Patrick Davis, left, and Staff Sgt. Joshua Tyree, right, shield an Afghan man's eyes from bright sunlight as Davis scans his iris with a handheld identity detection device during a combined clearing operation in Afghanistan's Ghazni province, April 29, 2012. Davis and Tyree are assigned to the 82nd Airborne Division’s 2nd Battalion, 504th Parachute Infantry Regiment, 1st Brigade Combat Team.