Defense Secretary James Mattis said Saturday the threat of a nuclear attack by North Korea is accelerating, warning the Trump administration is prepared to launch an all-out assault on the nation of 25 million people. Mattis was speaking alongside his South Korean counterpart during a visit to Seoul.

Defense Secretary James Mattis: “Make no mistake: Any attack on the United States or our allies will be defeated. Any use of nuclear weapons by the North will be met with a massive military response, effective and overwhelming.”