North Korea claims 'successful' nuclear warhead test

North Korea has successfully tested a nuclear warhead, it said Friday, drawing condemnation from the South which said the "maniacal recklessness" of young ruler Kim Jong-Un would lead to self-destruction. Pyongyang's state media said the test, which comes after a series of ballistic missile launches that have drawn international condemnation and UN sanctions, had achieved its goal of being able to fit a miniaturised nuclear warhead on a rocket. "Our nuclear scientists staged a nuclear explosion