During the intense nuclear testing programs of the Cold War, the United States conducted an extraordinary series of detonations across Bikini Atoll under Operation Hardtack I. One of the most dramatic ...

The test moves a compact energy project from planning into live reactor operation. Officials now face the harder task of ...

WEST PALM BEACH, Fla. — New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday. It was the ...

SEOUL, South Korea (AP) — North Korea said it conducted a “higher level” nuclear test explosion on Friday that will allow it to finally build an array of stronger, smaller and lighter nuclear weapons.

President Trump said on Thursday that the U.S. would begin testing nuclear weapons again for the first time in decades. "We've halted many years ago, but with others doing testing I think it's ...

As Iran’s nuclear program advances, the critical question of whether Tehran would need to conduct nuclear tests to ensure its weapons are effective looms over the consciousness of the international ...

In a particularly heated moment from his first term, Trump taunted North Korea’s Kim Jong Un — whose 2017 underground test is the last known example of explosive nuclear testing — for the relative ...

VIENNA (AP) — The head of the U.N. nuclear test ban treaty organization says arch-enemies Iran and Israel are “the closest” of the eight holdout nations to ratifying the treaty and assuring the world ...

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 ...

South Korea's unification ministry warned Monday that North Korea is in a position to conduct another nuclear test "immediately". The North was hit by strengthened United Nations sanctions earlier ...

This transcript was prepared by a transcription service. This version may not be in its final form and may be updated. Speaker 1: From the opinion pages of the Wall Street Journal, this is Potomac ...