In this image made from video provided by Korea Broadcasting System (KBS), North Korean leader Kim Jong Un signs a guest book watched by South Korean President Moon Jae-in, left, inside the Peace House at the border village of Panmunjom in the Demilitarized Zone Friday, April 27, 2018. Kim made history Friday by crossing over the world's most heavily armed border to greet his rival, Moon, for talks on North Korea's nuclear weapons. (Korea Broadcasting System via AP Stock Photo - Alamy

【KR】KBS2 TV Live

In this image made from video provided by Korea Broadcasting System (KBS), North Korean leader Kim Jong Un, left and South Korean President Moon Jae-in, right, cross the military demarcation line to the South side at the border village of Panmunjom in the Demilitarized Zone Friday, April 27, 2018. Kim made history Friday by crossing over the world's most heavily armed border to greet his rival, Moon, for talks on North Korea's nuclear weapons.(Korea Broadcasting System via AP Stock Photo - Alamy

In this image taken from video provided by Korea Broadcasting System (KBS), North Korean leader Kim Jong Un, left, and South Korean President Moon Jae-in, right, pose with children as Kim crossed the border into South Korea for their historic face-to-face talks, in Panmunjom Friday, April 27, 2018. Their discussions will be expected to focus on whether the North can be persuaded to give up its nuclear bombs.(Korea Broadcasting System via AP Foto stock - Alamy