SEOUL - North Korean leader Kim Jong Un and South Korean President Moon Jae-in had 'serious, frank' discussions on the denuclearization of the Korean peninsula and a permanent peace in their first summit session on Friday, a South Korean official said. The two sides were writing up a joint statement and the two leaders would announce it together when it was finished, the official, Yoon Young-chan, told a briefing. Yoon said Kim Jong Un's wife, Ri Sol Ju, would join Moon and Kim for dinner.