Lesson in an annual life of in an annual life of spring. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening as we come on the air tonight, it is already saturday morning in north korea and the day of that countrys most important holiday and that has american officials on edge braced for a possible military show of force from kim jongun. Increasing signs north korea is coupled with series of strong statements from the white house and ping yang and a volatile home to hundreds of thousands of americans. We get the latest from nbcs andrea mitchell. Reporter tonight all eyes on north korea, kim jongun on stage, applauded by thousands on the eve of a anniversary often military action. The birthday of the regimes founder, his grandfather. U. S. Officials say he may mark the holiday with a missile test or worse, his sixth nuclear test. Today a top aid to the north korean dictator lashing out at the u. S