Kim Jong Un crosses into South, shakes hands with Moon

In this image taken from video provided by Korea Broadcasting System (KBS) Friday, April 27, 2018, North Korean leader Kim Jong Un, left, shakes hands with South Korean President Moon Jae-in as Kim crossed the border into South Korea for their historic face-to-face talks, in Panmunjom. 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)

GOYANG, South Korea — With a single step over a weathered, cracked slab of concrete, North Korean leader Kim Jong Un made history Friday by crossing over the world’s most heavily armed border to greet his rival, South Korean President Moon Jae-in, for talks on North Korea’s nuclear weapons. Kim then invited Moon to cross briefly north with him before they returned to the southern side.