(170220) -- NEW YORK, Feb. 20, 2017 (Xinhua) -- Russian national flag flies at half-mast in memory of Russian Ambassador to the United Nations Vitaly Churkin, at the Permanent Mission of Russia to the UN in New York, the United States, on Feb. 20, 2017. The Russian Ambassador to the United Nations (UN) Vitaly Churkin suddenly died on Monday in New York, the Russian Foreign Ministry said in a statement. (Xinhua/Li Muzi)more(170220) -- NEW YORK, Feb. 20, 2017 (Xinhua) -- Journalists wait outside the Permanent Mission of Russia to the UN in New York, the United States, on Feb. 20, 2017. The Russian Ambassador to the United Nations (UN) Vitaly Churkin suddenly died on Monday in New York, the Russian Foreign Ministry said in a statement. (Xinhua/Li Muzi)more