Defense Secretary Jim Mattis warned North Korea on Sunday that any attack on the United States or its allies South Korea and Japan would be met with "a massive military response" as Washington responded to Pyongyang's sixth and most powerful nuclear test to date."We made clear that we have the ability to defend ourselves and our allies, South Korea and Japan, from any attack," Mattis told reporters after meeting with President Donald Trump and the national security team at the White House."Any threat to the United States or its territories, including Guam, or our allies will be met with a m…READ FULL ARTICLE