Obama to Deliver Warning to Putin on NATO’s Frontier

U.S. President Barack Obama touches down in Estonia tonight to deliver reassurance to Baltic nations and a direct warning to Russian President Vladimir Putin that NATO stands by its military commitment to alliance security.

Obama added a stop in Tallinn, Estonia, to a long-scheduled trip to this week’s North Atlantic Treaty Organization summit in Cardiff, Wales, as Putin ramped up support for separatists in Ukraine even after sanctions by the U.S. and European Union.