The U.S. intelligence community believes North Korea tested a nuclear device last month with an explosive yield of several kilotons, considerably more powerful than its first test nearly three years ago. David Albright [1]of the Ploughshares-funded Institute for Science and International Security [2]said the test shows that the North Koreans are "pushing their program along" and that they have "made progress." A U.S. official said last week that there are indications the North Koreans "may be preparing" for another nuclear test. Albright said further testing could "significantly advance [North Korea's] nuclear weapons craft."
Links
[1] http://www.ploughshares.org/expert/102
[2] http://www.isis-online.org/
[3] http://www.cnn.com/2009/WORLD/asiapcf/06/15/U.S.north.korea/index.html