
UN Secretary-General Ban Ki-moon (R) poses for a selfie with a tourist at the UN headquarters in New York, the United States, on Aug. 19, 2015. (Xinhua/Li Muzi)

UN Secretary-General Ban Ki-moon (R) poses for a selfie with a tourist at the UN headquarters in New York, the United States, on Aug. 19, 2015. (Xinhua/Li Muzi)