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President of the 72nd United Nations General Assembly Miroslav Lajcak (C) announces the opening of the General Debate of the 72nd session of the United Nations General Assembly, at the UN headquarters in New York, on Sept. 19, 2017. The General Assembly of the United Nations on Tuesday kicked off its annual general debate, with heads of state and government representatives gathering at the UN headquarters to present their views about pressing world issues. (Xinhua/Li Rui)