Here's Bill Clinton from October 1994 on how his deal was going to stop North Korea's nuclear weapons programme. That worked out well, didn't it?
On October 9, 2006, North Korea announced it had successfully conducted its first nuclear test. An underground explosion was detected, its yield was estimated as less than a kiloton, and some radioactive output was detected.
On January 6, 2007, the North Korean government further confirmed that it had nuclear weapons.
In April 2009, reports surfaced that North Korea has become a "fully fledged nuclear power", an opinion shared by International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei. On May 25, 2009, North Korea conducted a second nuclear test, resulting in an explosion estimated to be between 2 and 7 kilotons. The 2009 test, like the 2006 test, is believed to have occurred at Mantapsan, Kilju County, in the north-eastern part of North Korea.
On February 11, 2013, the U.S. Geological Survey detected a magnitude 5.1 seismic disturbance, reported to be a third underground nuclear test. North Korea has officially reported it as a successful nuclear test with a lighter warhead that delivers more force than before, but has not revealed the exact yield. Multiple South Korean sources estimate the yield at 6–9 kilotons, while the German Federal Institute for Geosciences and Natural Resources estimates the yield at 40 kilotons.
How stupid does Barack Hussein Obama think we are? What does he care if Iran gains nuclear weapons and can threaten or even attack Israel with them?