Professor Robert Kelly talks to Sky News about the increased activity at the Sohae satellite launching station in North Korea which has prompted the accusations.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Follow us on Twitter: https://twitter.com/skynews and https://twitter.com/skynewsbreak
Like us on Facebook: https://www.facebook.com/skynews
For more content go to http://news.sky.com and download our apps: