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

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 ...

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

For the first time in more than half a century, there are no binding restraints on the buildup of the largest nuclear forces ...

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 The relative calm of the post-Cold War world has been replaced by an era of dangerous competition with two nuclear armed adversaries ...

Add Yahoo as a preferred source to see more of our stories on Google. President Trump posted an eyebrow-raising statement on Wednesday night on US nuclear testing. The US hasn't tested a nuclear ...

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 ...

Employees at Lawrence Livermore National Laboratory work on a high-performance computer. Purdue researchers have collaborated with the national laboratory, using a similar high-performance computer to ...

Deterring Russia, collecting motherly advice and sending postmortem postcards, through readers’ eyes.

Add Yahoo as a preferred source to see more of our stories on Google. The last treaty between the U.S. and Russia that limited the number of deployable nuclear weapons expired on Thursday, marking the ...

It is also home to U.S. tactical nuclear weapons under NATO’s nuclear-sharing arrangements. Formally, Ankara remains bound by ...

The United States Air Force maintains a small, tightly controlled fleet of aircraft certified to deliver nuclear weapons, and ...