North Korea has fired a newly developed anti-aircraft missile, the latest in a recent series of weapons tests. North Korean media say the missile has QUOTE- remarkable combat performance. This week, Pyongyang also test fired a hypersonic gliding missile, a potential game-changer which can fly five times the speed of sound. The US has criticized North Korea’s weapons tests, with Secretary of State Antony Blinken accusing Pyongyang of increasing instability and insecurity. The North’s recent tests came after South Korea tested a submarine-launched ballistic missile, making it the first country without nuclear weapons to field such a missile.