Russian leader Vladimir Putin claimed his nation conducted a successful flight of a nuclear-powered cruise missile. Here’s ...

The head of the U.N. nuclear watchdog says Iran doesn’t appear to be actively enriching uranium but that the agency has ...

The lab where Oppenheimer developed the atomic bomb is the linchpin in the United States’ effort to modernize its nuclear ...

The missile is a nuclear-capable weapon that Moscow says can pierce any defense shield. Russia's top general said it traveled ...

Russian President Vladimir Putin is sending a message to President Donald Trump: Moscow wouldn’t be cowed into concessions on ...