In this photo provided by South Korea Presidential Blue House via Yonhap News Agency, North Korean leader Kim Jong Un, right, and South Korean President Moon Jae-in, left, shake hands before their meeting at the northern side of the Panmunjom in North Korea, Saturday, May 26, 2018. Kim and Moon have met for the second time in a month to discuss peace commitments they reached in their first summit and Kim's potential meeting with President Donald Trump. (South Korea Presidential Blue House/Yonhap via AP)