There is a new warning from Washington to North Korea, with boosted American military activity.<br /><br />The US has carried out a test of its ballistic missile defence system after Pyongyang’s latest launch of a missile that landed in the sea off Japan on Friday.<br /><br />Washington also said that two supersonic B-1B bombers have flown over the Korean peninsula, alongside South Korean and Japanese fighter jets.<br /><br />Earlier the US ambassador to the UN, Nikki Haley, Tweeted that her country was “done talking about North Korea”.<br /><br />In TV statements on Sunday, Pyongyang hit back at the US, warning it against what it calls “military adventure” and the use of tougher sanctions.<br /><br />North Korea claims it has been forced to develop long-range missiles and nuclear weapons because of what it calls “hostile intent” by Washington.<br /><br />Pyongyang’s missile test came a day after the US Senate approved a package of new sanctions against North Korea, Russia and Iran.<br />
