Afghanistan

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FILE - This Dec. 8, 2013 file-pool photo shows US troops listen to Defense Secretary Chuck Hagel speak at Camp Bastion, Afghanistan. If President Barack Obama decided to leave no military advisory force in Afghanistan next year, would Afghan security unravel to the point of enabling a civil war, a Taliban takeover and a return of al-Qaida in such numbers as to pose a 9/11-type threat. (AP Photo/Mark Wilson, File-Pool)