Secretary of State Hillary Rodham Clinton pauses during a news conference at NATO headquarters in Brussels on Wednesday, Dec. 5, 2012. (AP Photo/Kevin Lamarque, Pool)
U.S. Secretary of State Hillary Rodham Clinton (left) speaks with British Foreign Minister William Hague (right) during a meeting of NATO foreign ministers at the alliance's headquarters in Brussels on Wednesday, Dec. 5, 2012. (AP Photo/Virginia Mayo)
Turkish Foreign Minister Ahmet Davutoglu (left) speaks with British Foreign Minister William Hague (third from left) as U.S. Secretary of State Hillary Rodham Clinton stands at right during a meeting of NATO foreign ministers at the alliance's headquarters in Brussels on Tuesday, Dec. 4, 2012. (AP Photo/Virginia Mayo)
U.S. soldiers, part of NATO forces, play ultimate football to mark the Thanksgiving at the U.S.-led coalition base in Kabul, Afghanistan, Thursday, Nov. 22, 2012.(AP Photo/Musadeq Sadeq)
**FILE** U.S. Gen. John Allen, top commander of the NATO-led International Security Assistance Forces (ISAF) and U.S. forces in Afghanistan, speaks July 22, 2012, during an interview with The Associated Press in Kabul, Afghanistan. (Associated Press)
Afghan President Hamid Karzai (right) speaks during a joint press conference with NATO Secretary-General Anders Fogh Rasmussen at the presidential palace in Kabul, Afghanistan, on Thursday, Oct. 18, 2012. (AP Photo/Musadeq Sadeq)
U.S. Secretary of Defense Leon E. Panetta attends a meeting of NATO defense ministers at the alliance's headquarters in Brussels on Wednesday, Oct. 10, 2012. (AP Photo/Virginia Mayo)