TEXT: FILE - In this Sept. 14, 2018, file photo, South Korea's Unification Minister Cho Myoung-gyon, center left, and Ri Son Gwon, chairman of the North's Committee for the Peaceful Reunification, center right, attend at an opening ceremony for two Koreas' first liaison office in Kaesong, North Korea. (Korea Pool/Yonhap via AP, File)