Afghanistan: Hagel: U.S. withdrawal from Afghanistan "a very real possibility" --- Defense Secretary Chuck Hagel warned that a U.S. retreat from Afghanistan at the end of 2014 is entirely possible if Afghan President Hamid Karzai continues to refuse to sign a security agreement that will keep a handful of American and NATO troops in the country after 2014 to advise the Afghan security forces. -- “I hope he'll come to the right decision on this. Because we need that bilateral security agreement signed for our own planning, for our own purposes, as well as our international partners,” Hagel told CBS News State Department correspondent Margaret Brennan in an interview from Afghanistan, where he is traveling. -- Hagel warned that there is “a very real possibility” that the U.S. will have to make a full retreat from the country at the end of 2014 if Karzai doesn’t sign the agreement. -- “If we don't have a bilateral security agreement, which I've noted, that means we can't protect our forces that would be here after 2014, no international partners will come, Afghanistan essentially will be alone. But we have no other options,” he said. -- “Unless we have the security of an agreement to protect our forces…then we'll have no choice. We will not be able to stay,” he said.