SEOUL, South Korea - North Korea said Wednesday it successfully tested a new hypersonic missile it implied was being developed as nuclear-capable as it continues to expand its military capabilities while pressuring Washington and Seoul over long-stalled negotiations over its nuclear weapons.The North’s official Korean Central News Agency said the missile during its first flight test on Tuesday met key technical requirements set out by defense scientists, including launch stability and the maneuverability and gliding flight characteristics of the "detached hypersonic gliding warhead." State media released a photo of a missile mounted with a finned, cone-shaped payload soaring into the air while leaving a trail of bright orange flames.The.