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In this Sept. 15, 2000, 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. In 2000, athletes from the two Koreas marched together under a "unification flag" depicting their peninsula during the opening and closing ceremonies of the Sydney Olympics. The two Koreas will meet at their tense border on Tuesday, Jan. 9, 2018 to discuss how to cooperate on the Olympics. (AP Photo/Rusty Kennedy)