North Korean leader Kim Jong Un has declared an end to moratoriums on nuclear and intercontinental ballistic missile tests and threatened a demonstration of a “new strategic weapon” soon. Analysts said the announcement, reported by state media on Wednesday, amounted to Kim putting a missile “to Donald Trump’s head” — but warned that escalation by Pyongyang would probably backfire. Washington was swift to respond, with Secretary of State Mike Pompeo urging Kim to “take a different course” and stressing that the US wanted “peace not confrontation” with the North, while Trump played down the development.