Army Sgt. Donald Armstrong explains a biometric scanning system to Deputy Secretary of Defense Ashton M. Carter during a counter Improvised Explosive Device training exercise, on Fort Campbell, Ky., on June 20, 2012. Armstrong is assigned to the 101st Airborne Division.

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Keywords: 101st, airborne, archive, armed, campbell, carter, defence, depsecdef, division, forces, fort, kentucky, mcneeley, military, reportage, servicemen, usa