NEW YORK -- Resuming dialogue with Russia toward a new nuclear arms treaty would be a "challenge" amid Moscow's invasion of Ukraine, a senior U.S. State Department official says, while also noting little progress on proposed nuclear talks with China.
Interview
U.S. arms control talks with Russia a 'challenge' after Ukraine: diplomat
Nuclear discussions with China still up in the air despite efforts by Washington
Russian Yars intercontinental ballistic missile systems roll through central Moscow's Red Square on May 9 as part of a Victory Day parade. © Reuters
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