South Korean conservative activists hang an effigy (C) of North Korean leader Kim Jong-Un on a mock North Korean missile during a protest denouncing North Korea&#39;s rocket launch the day before, in Seoul on December 13, 2012. North Korea&#39;s rocket launch is a timely boost for its young leader, securing his year-old grip on power and laying to rest the humiliation of a much-hyped but failed launch eight months ago, analysts say.