 Complete the following phrase:  Over the next few months, the North Koreans started communicating more with their neighbors, as Supreme Leader Kim Jong-un secretly met with Chinese paramount leader Xi Jinping in March and then Moon Jae-in in an historic inter-Korean summit in April, and around the same time, a meeting between Trump and Kim was also proposed. On May 10, Pence accompanied Trump to Andrews Air Force Base as three American citizens were released by North Korea, and in an early morning interview with ABCs Jonathan Karl, he said seeing the men back on American soil was really one of the greatest joys of my life. Talks broke down later that month following comments made by Pence and Trump, comparing the situation to events in Libya 