Nuclear weapons expert: North Korea’s progress poses serious threat

Following North Korea's nuclear test on Tuesday, nuclear security expert Joe Cirincione tells On the Radar that North Korea's main motivation is to gain stature in the international community and says the U.S. should engage diplomatically with Pyongyang to stave off further weapons testing.  full article and video: http://news.yahoo.com/blogs/power-players-abc-news/nuclear-weapons-expert-north-korea-progress-poses-serious-115540427.html