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What next for North Korea? Kim Jong-un's nuclear ambitions and their global repercussions are explored in this special, extended edition of the programme. After a year of repeated weapons testing by the secretive regime that’s sparked a war of words with the United States, Ruth Alexander brings together six expert witnesses to dive deep into the detail of what is one of the biggest geopolitical challenges of our time. Their discussion examines North Korea’s weapons capability, the mind-set of its leader, the chance of war breaking out and the possibilities of finding a diplomatic solution. (North Korean leader Kim Jong-Un, flanked by vice-chair of the State Affairs Commission Choe Yong-Hae (L) at an opening ceremony. Photo credit: Ed Jones/Getty Images)