America's missile defense strategy shifts from relying on retaliation to building layered space defenses. Former officials say deterrence isn't enough.

Add Yahoo as a preferred source to see more of our stories on Google. The sponge metaphor first emerged in 1978 when the Air Force’s top general announced a new plan to base cutting-edge nuclear ...

Matt Korda, the associate director of the Nuclear Information Project at the Federation of American Scientists, assisted USA ...

North Korea launched multiple ballistic missiles toward the sea Sunday, its neighbors said, just hours before South Korea's president leaves for China for talks expected to cover North Korea's nuclear ...

The last remaining nuclear arms pact between Russia and the United States is set to expire this week, removing any caps on the two largest atomic arsenals for the first time in more than a ...

The risks of this stand-off have been contained over the years by various arms-control agreements, most recently New START. But that treaty expired this week, with no replacement. To make matters more ...

North Korea has launched a pair of ballistic missiles into the Sea of Japan on Tuesday, sparking renewed fears of a widespread nuclear conflict in Asia. South Korea's Joint Chiefs of Staff revealed ...

China’s large fleet of air-independent propulsion (AIP) submarines is set to become significantly more lethal. The introduction of the next-generation YJ-19 hypersonic missile dramatically elevates ...