US claims China carried out a 2020 underground nuclear test at Lop Nur, urging Beijing and Moscow to engage in disarmament after New START expired.
Beijing has balked at any restrictions on its smaller but growing nuclear arsenal and denies carrying out such a nuclear test.
A senior US arms control official disclosed newly declassified details of an alleged Chinese underground nuclear test and ...
Russian officials say an unidentified assailant has detonated an explosive device next to a patrol vehicle in Moscow, killing ...