U.S. ambassador to U.N.: North Korea is 'begging for war'

"Enough if enough," and the United Nations must exhaust all diplomatic means to halt the expansion of Pyongyang's nuclear program before it's too late, U.S. Ambassador Nikki Haley said at an emergency meeting of the Security Council on Monday, one day after North Korea conducted its sixth and by far most powerful nuclear test, which drew an angry response from the Trump administration. Defense Secretary Jim Mattis warned of a "massive military response" against North Korea. In a series of tweets, President Trump threatened to halt all trade with countries doing business with North Korea, a thinly veiled warning to China, who called Trump's threat "unacceptable." South Korea responded to Sunday's nuclear test by firing missiles into the sea Monday in a simulation of an attack on North Korea's primary nuclear sites.