U.S. Defense Secretary Leon Panetta speaks to the troops during a visit to Kandahar Airfield in a Dec 13, 2013 file photo. Photographer: Susan Walsh, Pool/Getty Images
U.S. Defense Secretary Leon Panetta speaks to the troops during a visit to Kandahar Airfield in a Dec 13, 2013 file photo. Photographer: Susan Walsh, Pool/Getty Images
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