In Eastern Europe, saber rattling — or risky escalation?

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You'd never know it from this year's campaign, but Russia and NATO are engaged in the biggest military buildup since the Cold War. In addition to Syria and Ukraine, the next US president might be faced with Russian aggression in the Baltic States and puppets of the former Soviet Union. Vladimir Putin has deployed forces and talked about using nuclear weapons. Comparisons are being made to the Cuban Missile Crisis of 1962. NATO has changed the name for its military buildup in the region from "reassurance" to "deterrence" and is responding with tanks and troops -- at a time when the European Union is weakened and American leadership is fraught with uncertainty.