NASA has completed over 100 cold-flow tests of a full-scale nuclear rocket reactor prototype, demonstrating stable hydrogen ...

Russian President Vladimir Putin chairs a meeting with members of the Security Council in Moscow, Russia, Wednesday, Nov. 5, 2025. (Gavriil Grigorov, Sputnik, Kremlin Pool Photo via AP) MOSCOW — ...

Senate Democrats want to curb President Donald Trump’s ability to unilaterally resume nuclear testing, as the president suggested the U.S. would do on an "equal basis" with Russia and China moving ...

(CNN) — US President Donald Trump and Russian President Vladimir Putin have spent weeks trading threats to restart nuclear tests, an escalation kicked off by Putin’s boasts about tests of the Poseidon ...

Russia's Vladimir Putin ordered top officials on Wednesday to submit plans for the possible resumption of nuclear testing, a direct response to President Donald Trump's surprise instruction for the ...

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 ...

The world passed a nuclear milestone this week. And, perhaps surprisingly given the recent run of saber-rattling from the likes of Russia and the United States, it’s a positive one. “As of today, the ...