In an exclusive interview, a top Iranian official says that Khomeini personally stopped him from building Iran's WMD program.
Researchers at Lockheed Martin's famous Skunk Works say they have a breakthrough concept that could bring the world clean, safe fusion energy sooner than anybody thought.
Five reasons a quiet North Korea is still a deadly North Korea.
The first rule of Israel's nuclear arsenal is that there is no Israeli nuclear arsenal.
The Obama administration is embarking on a multibillion-dollar nuclear spending spree. Problem is, none of it is necessary.
What a rising generation of scientists and apparatchiks means for North Korea's nuclear program.
Iran’s nuclear negotiators have public opinion on their side for now. But if that disintegrates, so could any hope for a deal with the West.
Yep, Putin just threatened to use his nukes. Now it’s time for Washington to decide on a time-out for the Russian president.
Secretary of State John Kerry needs to pay Kim Jong Un a visit. Because North Korea is muscling up and the Obama administration's "strategic patience" isn't working.
Why is the United States taking Moscow to task over noncompliance with the Intermediate-Range Nuclear Forces Treaty?
Why ongoing and close ties between Pyongyang's and Tehran's nuclear programs are cause for concern.
Why the United States can't budge on allowing Iran to build more centrifuges.
The only way to reach a nuclear deal with Iran is to accept that Iran will be able to go nuclear.
Why President Obama needs to stand up to the warmongers who want to kill the Iranian nuclear deal.
How social media and a little sleuthing turned up a Mao-era nuclear program.
But let's all take a deep breath: Tokyo may be dumb, but it's not stupid.
An independent Scotland would evict the United Kingdom’s nuclear force. So, then, what would Britain do with its 225 weapons?
A court ruling in Japan could freeze Tokyo's plans to restart nuclear reactors after Fukushima.
Congress and Obama are planning Reagan-era expenditures to modernize U.S. nuclear weapons under sequestration-era budgets. What could possibly go wrong?
As the hard-liners wage a media war against the reform government of Hassan Rouhani and his nascent nuclear deal, the West has to step up and show it means business.
Pyongyang's military is in decline? Think again. New satellite images show that nukes aren't the only thing on North Korea's mind these days.
Reaching out to Tehran, not smashing its economy, is what made the nuke deal possible -- and it could have happened much earlier.
The general sanctioned for dealing with North Korea -- and the village he razed to build a weapons factory.
Military muscle flexing in Asia; Hagel's approval rating low; Crash in Afg probably an accident; Assad to seek a third term; In China, the Big Ban Theory; and a bit more.
Has Russia broken its pledge not to test medium-range nukes? The answer isn't as clear as you might think.
Will Obama tweak missile defense posture?; McCain, Flake furious about the VA; Blue Angels commander in hot water; Hagel brings the muscle; Marine regrets crucifying himself; and a bit more.
The push underscores a fundamental question: Can the nuke force police its own?
For all the worries about Russia's energy stranglehold over Europe, the continent is still looking to Moscow for nuclear reactors.