Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

Warren Buffett is warning that the risks posed by rapid AI development are reminiscent of a geopolitical issue that defined ...

Japan doesn’t seem likely to develop nuclear weapons in the short-term. However, the tensions that triggered this episode are ...

The Trump administration touted last year’s bombing of Iranian nuclear sites as one of its great military successes. But a ...

After meeting with Israel's Netanyahu, Trump said he'd heard Iran is trying to rebuild its nuclear program, "and if they are, we're going to have to knock them down." ...

The death of the last treaty between Russia and the U.S. that limited the size of nuclear arsenals may spark a new arms race, ...

Great power competition gives the United States all the more reason to invest in international cooperative frameworks for ...

Commercial nuclear reactors all work pretty much the same way. Atoms of a radioactive material split, emitting neutrons.

He played a key role in ending apartheid South Africa’s secret weapons program in the 1980s by helping the African National ...

Beijing releases 30-page report that includes a call for international community to ‘take concrete and strong measures’ ...

And, well, they were slow and easily shot down, by air or by ground forces.

As the cloud cleared, Air Force bombers dropped in to gather air samples. Researchers hoped that the radioactive fallout ...