UN Secretary General Antonio Guterres used his opening speech at the Munich Security Conference on Friday to warn against conflict in Ukraine, saying it was “high time to seriously de-escalate.” “With a concentration of Russian forces around Ukraine, I am deeply concerned about heightened tensions and increased speculation about a military conflict in Europe. I still think it will not happen. But if it did, it would be catastrophic,” he said. “I am often asked whether we are in a new Cold War. My answer is that the threat to global security now is more complex and probably higher than at that …