UN Secretary General Ban Ki-moon (L) and Japanese Prime Minister Taro Aso (R) arrive for a joint press conference following their meeting at Aso's official residence in Tokyo on July 1, 2009. During the press conference Aso described North Korea's missile and nuclear tests as a "serious threat" to the world whilst Ban vowed to "spare no effort" to achieve a nuclear-free North Korea. Getty Images logo Getty Images 32 months ago

UN Secretary General Ban Ki-moon (L) and Japanese Prime Minister Taro Aso (R) arrive for a joint press conference following their meeting at Aso's official residence in Tokyo on July 1, 2009. During the press conference Aso described North Korea's missile and nuclear tests as a "serious threat" to the world whilst Ban vowed to "spare no effort" to achieve a nuclear-free North Korea.