North Korean leader Kim Jong Un, left, and South Korean President Moon Jae-in, right, are greeted by children at the border.

North Korean leader Kim Jong Un, left, and South Korean President Moon Jae-in, right, are greeted by children at the border.

North Korean leader Kim Jong Un, left, and South Korean President Moon Jae-in, right, are greeted by children at the border.

North Korean leader Kim Jong Un, left, and South Korean President Moon Jae-in, right, are greeted by children at the border