No Radiation Found From North Korean Test

CNN reports the initial air sampling over North Korea shows no indication of radioactive debris from North Korea claimed nuclear test.

CNN quotes an official as saying, "there isn't information to allow confirmation it was a nuclear test." This is not proof the North Korean event was not a nuclear test, only that it cannot be confirmed with the available information.

UPDATE: CNN, the Associated Press, the BBC, the Guardian now report preliminary analysis of air samples from North Korea contain radioactive debris consistent with a nuclear test.