North Korea demonstrated its first nuclear weapon, shattering the 1994 “agreed framework” that limited the country’s nuclear ambitions and dramatically changing the balance of power in the region.For the past 15 years, the secretive nation has slowly made progress towards the development of a nuclear warhead small enough to be used in a missile and an intercontinental delivery system that could strike targets in the US.And Kim Jong-un’s scientists seem to be getting secret help from sanction-busting missile designers in Russia or Ukraine.While North Korea’s primary goal is to conquer its neighbour in the south, continued American backing for Seoul has made invasion impossible.North Korean leader Kim Jong-un has sworn to expand his country's.
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