We must reassure the Baltics and Ukraine – who live in the very shadow of Russia – that the United States will be there for them if trouble arises. Russian intimidation of our NATO allies or other free nations cannot be tolerated. It is conventional wisdom that history repeats itself. But the world should hope – and pray – that this maxim is off base when it comes to our global security. Security arrangements, like the North Atlantic Treaty Organization (NATO), which through 71 years since the end of World War II have kept us safe from yet another global conflict, are quickly showing signs of coming undone.