U.S. Defense Secretary Leon Panetta and Afghanistan President Hamid Karzai arrive for their joint news conference at the Presidential Palace in Kabul, Afghanistan, Thursday, Dec. 13, 2012. (AP Photo/Susan Walsh, Pool)

Photo by: Susan Walsh

U.S. Defense Secretary Leon Panetta and Afghanistan President Hamid Karzai arrive for their joint news conference at the Presidential Palace in Kabul, Afghanistan, Thursday, Dec. 13, 2012. (AP Photo/Susan Walsh, Pool)