Russian officials say they are waiting for an explanation from President Donald Trump about nuclear testing. He hasn't given ...

Experts agreed if the U.S. resumed full nuclear weapons tests, other nations would do the same — giving them a chance to ...

Marco Rubio told reporters Wednesday that nuclear testing plans are "on par with what other countries are doing." ...

Trump's announcement breaks with more than three decades of policy. The last time the United States tested a nuclear weapon was in 1992.

President Trump wants to restart domestic testing to keep up with adversaries like China and Russia, but nuclear experts ...

Trump ordered the U.S. military to resume nuclear weapons testing. Why were they stopped and why restart now? What to know.

Few people know the harm nuclear testing can do better than inhabitants of the Marshall Islands which was a US-administered trust territory of the United Nations from 1947 to 1986.

But what of the real world in which Donald Trump, a mercurial president with sole authority to fire thousands of nukes, displays deep confusion about nuclear weapons and his national-security staff ...

Energy Secretary says administration will tests nuclear weapons ‘systems’ without detonating devices — for now ...