Firings and buyouts hit the top-secret National Nuclear Safety Administration amid a major effort to upgrade America’s ...

North Korea's Foreign Ministry said that its "nuclear armed forces will exist forever as a powerful means of justice," ...

Everyone should understand that if the liberal order falls, the nonproliferation regime would fall with it. And the powers ...

Donald Trump’s exclamation that Ukraine’s defense of its territory could cause a nuclear war was extraordinarily dangerous.

It’s a new day in Europe. Gone are the halcyon years of unshakeable American commitment to Europe’s defense against Russia.

Trump sent a letter to Tehran proposing negotiations on its nuclear program or threatening military action. But he hasn’t ...

North Korea said on Monday it will steadily upgrade and bolster its nuclear armed forces and blamed the foreign ministers of ...

Talk of replacing the American nuclear umbrella over Europe with the small British and French nuclear armories is in the air, ...

Ukraine surrendered its Soviet-era nuclear stockpile more than three decades ago and experts have questioned whether Kyiv ...

For decades, the U.S. has led the race to clean, limitless nuclear fusion energy. Now China is catching up, spending twice as ...

North Korea on Monday vowed to "steadily update and strengthen" its nuclear arsenal, rejecting a joint statement by the Group ...