Â鶹Éç

Available for over a year

North Korea claims to have carried out a successful test of a hydrogen bomb. It raises fears that the country could soon have a usable nuclear weapon. But would it consider using such a weapon? Would it be a deterrent only, or could North Korea consider firing first? John Everard is a former British ambassador to North Korea. (Picture - People watch a news report on North Korea's first hydrogen bomb test at a railroad station in Seoul, South Korea, showing images of former nuclear tests. Credit - Jung Yeon-Je/AFP/Getty Images)