The Eyes Have It

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Army photo / Sgt. Michael J. MacLeod

A paratrooper with the 82nd Airborne Division's 1st Brigade Combat Team uses a Handheld Interagency Identity Detection Equipment -- HIIDE -- to scan the iris of a villager May 29 in Ghazni Province, Afghanistan. The system stores unique information -- kind of like fingerprints -- that the U.S. military uses to determine if the eye being scanned belongs to friend or foe.