In a world that in many ways resembles the 1910s and the 1930s, it is the American John Boltons, Nikki Haleys and James Mattises the world needs, not the appeasement posturing of Cold War liberals, Neville Chamberlains and Marshal Petains. American toughness has potential. North Korea, formerly testing a slew of nuclear missiles, has found itself increasingly isolated and constricted by American-led international efforts. Now, they are reaching out to neighbors, signaling a willingness to talk, and a willingness to set aside their nuclear weapons. Time will tell whether they are serious, but American scrutiny and pressure must be maintained until it can be known.