U.S. announces withdrawal from landmark nuclear treaty with Russia, sparking worry, criticism

U.S. Secretary of State Mike Pompeo speaks during a press briefing in Washington D.C., the United States, 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)