The denuclearisation of North Korea 'has never ever been possible', says North Korean specialist Andrei Lankov, as North Korea fired off another round of cruise missiles on Tuesday, according to Seoul's military. The launches extended a week-long flurry of tests that Pyongyang has said include a new generation of weapons. Recently North Korean leader Kim Jong Un declared the South his country's "principal enemy", jettisoned agencies dedicated to reunification and outreach, and threatened war over "even 0.001 mm" of territorial infringement. IMAGES AND SOUNDBITES