The Poseidon’s power significantly exceeds the power of even our most promising Sarmat intercontinental range missile,” Putin said.

President Donald Trump announced he is ordering the U.S. to resume nuclear testing, leaving experts wondering what this would entail and how it would be implemented.

President Donald Trump ordered the U.S. to resume nuclear testing for the first time since a moratorium was declared in 1993.

Russian President Vladimir Putin said Tuesday that the country successfully tested its nuclear-powered Poseidon torpedo, a long-range underwater drone capable of carrying a nuclear warhead and designed to evade traditional missile defenses.

US president claims China, Russia have carried out secret nuclear weapon tests as he seeks to justify return to testing.

Top pick to lead U.S. Strategic Command said he would provide his best military advice as the president pushes to restart nuclear weapons testing.

“These are not nuclear explosions. These are what we call noncritical explosions ... after Russia announced it had tested a new atomic-powered and nuclear-capable underwater drone and a new nuclear-powered cruise missile. Russia responded to Trump ...

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.S.