South Korea has charged that North Korea had failed to give its top nuclear negotiator the authority to broker a deal at six-nation talks on Pyongyang’s arms programs that ended in deadlock. “It has nothing to do with an attitude,” South Korea’s top negotiator Chun Yung-Woo told AFP as he left a Beijing hotel to return to Seoul. “There must have been strict instructions from Pyongyang that they should not officially address the nuclear issue.” Full Story