(190201) -- WASHINGTON, Feb. 1, 2019 (Xinhua) -- U.S. Secretary of State Mike Pompeo (Front) arrives for a press briefing in Washington D.C., the United States, on Feb. 1, 2019. The Trump administration announced on Friday that the United States is withdrawing from a landmark nuclear arms control pact with Russia, a move seen as exacerbating the risk of an international arms race. (Xinhua/Liu Jie)