FILE POOL - In this July 9, 2011 file photo, USMC Gen. John Allen, left, and Army Gen. David Petraeus, top U.S. commander in Afghanistan and incoming CIA Director, greet former CIA Director and new U.S. Defense Secretary Leon Panetta, right, as he lands in Kabul, Afghanistan, Saturday, July  9, 2011.  (AP Photo/Paul J. Richards, Pool)
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