A major nuclear arms control pact between the United States and Russia expired on Friday, raising the specter of a new Cold War-style arms race.
The move came after U.S. President Donald Trump said last October that he would withdraw the United States from the Intermediate-Range Nuclear Forces Treaty, which limits the size of each nation's arsenal of missiles.
The United States had long contended that Russia has been in breach of the pact by deploying a range of tactical nuclear weapons to intimidate former Soviet states that have aligned with the West. Russia, however, denies violating the accord.