Vladimir Putin's hypersonic missile carried a simple message to the West over Ukraine: back off, and if you don't, Russia reserves the right to hit U.S. and British military facilities.

President Biden dropped his opposition to Ukraine firing U.S. missiles at targets deep inside Russia in response to North Korea's entry to the war, a shift in U.S. policy that took on added urgency ...

Russian President Vladimir Putin on Friday promised more combat test-firing of an experimental hypersonic missile launched at ...