North Korean leader Kim Jong Un, top, approaches to shake hands with South Korean President Moon Jae-in at the border village of Panmunjom in the Demilitarized Zone, South Korea, on Friday.

North Korean leader Kim Jong Un, top, approaches to shake hands with South Korean President Moon Jae-in at the border village of Panmunjom in the Demilitarized Zone, South Korea, on Friday.

North Korean leader Kim Jong Un, top, approaches to shake hands with South Korean President Moon Jae-in at the border village of Panmunjom in the Demilitarized Zone, South Korea, on Friday.

North Korean leader Kim Jong Un, top, approaches to shake hands with South Korean President Moon Jae-in at the border village of Panmunjom in the Demilitarized Zone, South Korea, on Friday.