"Rhetoric sometimes turns into action in unpredictable ways," a former senior U.S. arms control official told Newsweek.

Global tensions have hit a dangerous new peak as Russian President Vladimir Putin announces the termination of a key nuclear arms pact with the United States. The move comes amid escalating hostilities following U.

The first official statement from the Kremlin about Trump’s move seemed to distance Russian President Vladimir Putin from Dmitry Medvedev’s inflammatory comments.