South Korean President Moon Jae-in, front row fourth from right, his wife, Kim Jung-sook, and Ivanka Trump, U.S. President Donald Trump's daughter, watch the closing ceremony of the 2018 Winter Olympics along with Kim Yong Chol, back row right, vice chairman of North Korea's ruling Workers' Party Central Committee, in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Aaron Favila)