Nuclear war has always existed in the background of modern life as the kind of threat that is too big to fully process, so ...

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During the late 1970s, the United States developed a nuclear weapon designed not to flatten cities but to kill the people inside them. The neutron bomb, formally known as an enhanced radiation weapon, ...

Erin D. Dumbacher is the Stanton nuclear security senior fellow at the Council on Foreign Relations. The United States has the power and a process to respond when it is under nuclear attack, but only ...

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 weapons. The country’s ...

Add Yahoo as a preferred source to see more of our stories on Google. A subsurface atomic test near Yucca Flats, Nev., in March 1955. (U.S. Atomic Energy Commission via AP) (U.S. Atomic Energy ...

President Trump's comments about restarting weapons tests are not likely to lead to mushroom-cloud explosions over the New Mexico desert or seismic shaking underground in Nevada, according to the ...

Nuclear weapons tests were once a regular occurrence, but most countries haven’t tested in decades, following the adoption of the Comprehensive Nuclear-Test-Ban Treaty in 1996. Now, that moratorium ...

The mystique of nuclear-powered submarines has been captured by at least half a dozen popular Hollywood films. Some have centered on the drama of undersea warfare and the risk of global nuclear ...

Add Yahoo as a preferred source to see more of our stories on Google. Iranian Parliament Speaker Mohammad Bagher Ghalibaf looks on as parliament members chant in support of the IRGC while wearing ...

The United States openly tracks thousands of nuclear warheads, yet a small number have slipped permanently out of reach. Yes, the US has lost 6 nuclear weapons, and each disappearance left a trail of ...