** FILE ** U.S. Defense Secretary Leon E. Panetta (left) meets with Afghan President Hamid Karzai in Kabul, Afghanistan, on Thursday, March 15, 2012. (AP Photo/Mohammad Ismail, Pool)

Photo by: Mohammad Ismail

** FILE ** U.S. Defense Secretary Leon E. Panetta (left) meets with Afghan President Hamid Karzai in Kabul, Afghanistan, on Thursday, March 15, 2012. (AP Photo/Mohammad Ismail, Pool)