The head of the organization overseeing a treaty banning nuclear testing is warning that if the United States, Russia or any ...

The missile aims to be a less expensive, but still survivable standoff weapon option that can be built in large numbers.

After several tests of unusual “nesting doll” satellites in low-Earth orbit, Russia is now fielding operational ...

The war in Ukraine has become a contest of attrition, logistics and adaptation. Drones scout trenches. Artillery pounds supply lines. Air defenses intercept what they can. In that environment, even ...

The U.S. is racing to develop hypersonic weapons to counter China and Russia, but delays, limited testing and shifting ...

Freed from ethical constraints and hardened by years of war, a country long seen as a bureaucratic giant has become an ...