Kim Jong-un has warned America it faces "unimaginable consequences" over sanctions against North Korea.<br />A government statement published following fresh sanctions against the dictatorship over its arms development programme warns America such actions would only "only heighten the spirit of self-reliance".<br />It said: "If the US persistently pursues its anachronistic hostile policy toward the North Korea this way, this would only entail unimaginable consequences quite contrary to what the US desires.<br />North Korea carried out tests on nuclear devices in 2006, 2009 and 2013 and is currently under United Nations sanctions banning trade and financing activities that aid its weapons programme.<br />A hydrogen bomb, also known as a thermonuclear bomb, uses fusion technology and is the most powerful known weapon on earth - far more powerful than an atomic bomb.
