"We will not tolerate nuclear weapons in North Korea." - President Bush, May 2003 Link
The 2006 North Korean nuclear test was the detonation of a nuclear device conducted on October 9, 2006 by the Democratic People's Republic of Korea. North Korea announced its intention to conduct a test on October 3, six days prior. The blast is estimated to have had an explosive force of less than one kiloton, and some radioactive output was detected. United States officials suggested the device may have been a nuclear explosive that misfired. An anonymous official at the North Korean Embassy in Beijing told a South Korean newspaper that the explosive output was smaller than expected. Due to the secretive nature of North Korea and small yield of the test, there remains some question as to whether it was an unusually small successful test, or a partially failed "fizzle" or dud.