North Korea says its nuclear and ballistic missile programs are non-negotiable . The U.S. and South Korea say a way to dismantle those programs must be on the table . ___ China 's top priority is keeping Kim Jong Un 's regime from collapse .
North Korea says its nuclear and ballistic missile programs are non-negotiable . The U.S. and South Korea say a way to dismantle those programs must be on the table . South Koreans may want nuclear weapons of their own , an idea that rankles China . China 's top priority is keeping Kim Jong Un 's regime from collapse .