 In response, North Korea issued a series of threats against the U.S. territory of Guam as well as allies such as Japan and South Korea.Two missiles were flown over Japanese territory and a nuclear test was conducted.In a speech to the United Nations General Assembly in September 2017, Trump threatened to "totally destroy" North Korea if the United States were "forced to defend itself or its allies"; he repeated his recent nickname for Kim Jong-un as "Rocket Man".