Photo by: Mark Lennihan Kim Yong Chol, center, a top North Korean official, leaves his hotel for a meeting with U.S. Secretary of State Mike Pompeo, Thursday, May 31, 2018, in New York. Kim is in New York for talks aimed at salvaging a summit between Kim Jong Un and President Donald Trump, in the North's highest-level mission to the United States in 18 years. (AP Photo/Mark Lennihan)