“The surprise visit by the director of the Central Intelligence Agency to Moscow this week was to deliver a warning to Russia not to attack NATO countries,” the Wall Street Journal reports.“The trip was spy-agency chief John Ratcliffe’s first publicly known visit to the Russian capital. It followed new U.S. intelligence assessments, that Russian President Vladimir Putin could try to test the resolve of the North Atlantic Treaty Organization with a limited assault on an allied country in the next few years.”