Although wartime expediency demanded the more straightforward fission path to a weapon, such hydrogen bombs would soon become ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

President Donald Trump's comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of American policy in regards to the bomb, but come as Washington's ...

For the first time in more than half a century, there are no binding restraints on the buildup of the largest nuclear forces on Earth. The New START treaty expired on Feb. 5, 2026, ending the last ...

Nuclear deterrence is once again central to U.S. national security. The relative calm of the post-Cold War world has been replaced by an era of dangerous competition with two nuclear armed adversaries ...

Imagine if you will, a low-cost, small weapons system. It could fly stealthily into enemy territory, not being mistaken for a bomber or any kind of missile. And then it could detonate a nuclear weapon ...

President Donald Trump said this week that he wants the Defense Department to begin testing nuclear weapons "immediately," but experts say that's wishful thinking. The U.S. has only one location where ...