`` It would not provide the United States and NATO allies the clarity necessary to plan for a potential post-2014 military presence , '' the statement said . ' Hamid Khan says he ' n't negotiate a security deal until after Christmas . That 's ` ` not viable , '' U.S. National Security Advisor Susan Rice says . The delay could mean American troops pull out of Afghanistan earlier than expected .
' Hamid Khan says he ' n't negotiate a security deal until after Christmas . That 's ` ` not viable , '' U.S. National Security Advisor Susan Rice says . The delay could mean American troops pull out of Afghanistan earlier than expected .