By Jack Kim, Soyoung Kim and Steve Holland
Reuters
September 3, 2017
North Korea on Sunday conducted its sixth and most powerful nuclear test, which it said was of an advanced hydrogen bomb for a long-range missile, marking a dramatic escalation of the regime’s stand-off with the United States and its allies.
Washington responded aggressively, with President Donald Trump refusing to rule out military action and threatening to cut off trade with any country doing business with Pyongyang.