FILE - In this Sept. 15, 2000 file photo, Pak Jung Chul, left, a North Korea's Judo coach, and Chung Eun-sun, a South Korean basketball player, carry a flag representing a united Korea into Olympic Stadium during the Opening Ceremony of the Olympics in Sydney, Australia. Seven months ahead of the Pyeongchang Olympics, many in South Korea, including new liberal President Moon Jae-in, hope to use the Games as a venue to promote peace with rival North Korea. To do so, the North’s participation is essential, but an ongoing nuclear tension and a lack of winter sports athletes in North Korea could ruin the attempts at reconciliation. (AP Photo/Rusty Kennedy, File)