President Donald Trump declined to say Friday whether he plans to resume underground nuclear detonation tests, as he had seemed to suggest in a social media post this week that raised concerns the U....

President Donald Trump reaffirmed on Friday that the US would resume nuclear testing, and he did not answer directly when asked whether that would include the traditional underground nuclear tests tha...

According to the Stockholm International Peace Research Institute (SIPRI), Russia currently holds around 5,489 nuclear warheads, compared to 5,177 for the United States and 600 for China.