Resuming full testing of nuclear weapons — as President Donald Trump called for last week — would be unnecessary, costly, undermine nonproliferation efforts, and empower the nation’s adversaries to ...

Independent analysts confirm parts of a controversial study suggesting unknown objects appeared when humanity detonated nukes ...

United States Energy Secretary Chris Wright says planned nuclear tests will be “noncritical” and will not feature any nuclear explosions for now. This clarification on Sunday came three days after ...