North Korean nuclear tests
Democratic People’s Republic of Korea conducted in this century three nuclear tests. The first one in 2006, the second one in 2009 and the last one in 2013.
In October 2006 Pyongyang announced that it had carried out an underground nuclear explosion. It was held at P’unggye-yok. Few days after the United States checked the radioactive debris in air and confirmed that the test was really conducted.
The weapon was made of plutonium, however, it is estimated that the weapon is not an effective and powerful one. The bomb that was dropped on Hiroshima was ten times bigger.
Nevertheless, United States imposed military and economic sanctions on North Korea. In 2007 Democratic People’s Republic of Korea agreed to stop using its main nuclear reactor at Yongbyon. But than North Korea interrupted the talks and stopped the compliance with the laid down rules.
On 25 May 2009 North Korea conducted the second underground nuclear test, the more powerful one, the bomb was similarly strong as the American weapons used in 1945 bombings of Nagasaki and Hiroshima. The North Korean officials declared that the purpose is self-defence.
The United Nations Organisation published a resolution condemning the nuclear test and deepened the sanctions against North Korea.
On 12 February 2013 an unusual seismic activity was found out and subsequently it was confirmed that Pyongyang conducted third nuclear test. The weapon is estimated to be very effective and light. Unfortunately, it is estimated that North Korea is focused on development of a nuclear weapon small enough to fit on a long-range missile.