Sixty-five years after the Korean War ended in an armistice, North Korean leader Kim Jong Un will become the first leader from the North to set foot on South Korean soil when he strides across the Demilitarized Zone on Friday for a historic summit with the rival South's president, Moon Jae-in.

The meeting, the third inter-Korean summit, will likely be tightly scripted — focusing on denuclearization, establishing permanent peace on the peninsula and improving relations ahead of a highly anticipated encounter between Kim and U.S. President Donald Trump in May or June.

Among those three key agenda items, talks on the North's nuclear weapons are expected to take center stage.