N. Korea missile launch fails on founder's birthday

North Korea tried and failed to test-fire what appeared to be a medium-range Musudan missile on the birthday of founding leader Kim Il-Sung Friday, a high-profile misstep after Pyongyang claimed a series of breakthroughs in its nuclear weapons programme. The April 15 birthday of Kim Il-Sung -- the grandfather of current ruler Kim Jong-Un -- is a major public holiday in North Korea, where key political anniversaries are often marked with displays of military muscle. The country is also gearing up