United Nations Messenger of Peace Leonardo DiCaprio poses for a photo during a special screening of a new climate change documentary "Before the Flood", at the UN headquarters in New York, the United States, Oct. 20, 2016. (Xinhua/Li Muzi)
United Nations Messenger of Peace Leonardo DiCaprio poses for a photo during a special screening of a new climate change documentary "Before the Flood", at the UN headquarters in New York, the United States, Oct. 20, 2016. (Xinhua/Li Muzi)