Was it a real nuke?

[Anatole]

North Korea sets off an earthshaking explosion _ and claims it was nuclear. Was it? For scientists, that was not a quick and easy question to answer.

http://asia.news.yahoo.com/061009/ap/d8kl919g0.html

[Wolf]

N. Korea 'Sorry' for Nuke Test now

North Korean leader Kim Jong Il said Pyongyang didn't plan to carry out any more nuclear tests and expressed regret about the country's first-ever atomic detonation last week, a South Korean news agency reported Friday.

http://www.breitbart.com/news/2006/10/20/D8KSCOOO0.html