U.S. Army Spc. Charles Liptok, from Durham, N.C., serving with Hatchet Company, 1st Battalion (Airborne), 501st Infantry Regiment, prepares to scan the retinas of a local Afghan boy using a Secure Electronic Enrollment Kit, Gorbuz district, Khost province, Afghanistan, April 26, 2012. U.S. paratroopers and counterparts of the Afghan Border Police set up a traffic control point while waiting for Explosive Ordinance Disposal to destroy a found improvised explosive device.