A senior State Department official on Tuesday said the U.S. still is assessing how to implement President Donald Trump's ...

States may be tempted to pursue their own nuclear weapons as they seek deterrence against attacks amid uncertainty over US guarantees.

Secretary of War Pete Hegseth’s recent announcement that the U.S. will resume testing nuclear weapons has alarmed some nuclear-arms experts. It shouldn’t. President Trump had already announced earlier ...

Across the world, leaders and security officials are asking the question, does survival mean having a nuclear deterrent?

Nuclear weapons tests are among the most violent events humans can trigger, and that violence leaves fingerprints in the Earth, sea, air, and even in orbit. The physics of shock waves, sound, and ...

The B-52H Stratofortress is continuing the integration tests with the AGM-181 Long Range Stand Off (LRSO) missile, the Air ...

Add Yahoo as a preferred source to see more of our stories on Google. U.S. President Donald Trump with Chinese President Xi Jinping. China's nuclear expansion is on a trajectory to soon rival ...

Add Yahoo as a preferred source to see more of our stories on Google. The US said it has intelligence that China conducted banned nuclear explosive tests. The nuclear monitoring organization said it ...

When Iran’s covert nuclear program came to international attention over two decades ago, Tehran insisted that its intentions were peaceful and that it had no plans to develop nuclear weapons.

Late last week, the U.S. leveled an explosive claim: China is planning secret nuclear weapons tests and has already conducted at least one. The undersecretary of state for arms control and ...

Some of the most powerful weapons ever developed by the United States were designed to dominate the battlefield, but in doing ...