In this May 26, 2018 photo provided May 27, 2018, by South Korea Presidential Blue House via Yonhap News Agency, North Korean leader Kim Jong Un, right, and Kim Yong Chol, a former military intelligence chief who is now a vice chairman of the North Korean ruling party's Central Committee tasked with inter-Korean relations, second from left, wave to South Korean President Moon Jae-in, unseen, after their meeting at the northern side of the Panmunjom in North Korea. (South Korea Presidential Blue House/Yonhap via AP)