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South Korean President Moon Jae-in speaks during the General Debate of the 72nd session of the United Nations General Assembly, at the UN headquarters in New York, Sept. 21, 2017. (Xinhua/Li Muzi)

South Korean President Moon Jae-in speaks during the General Debate of the 72nd session of the United Nations General Assembly, at the UN headquarters in New York, Sept. 21, 2017. (Xinhua/Li Muzi)