North Korea does not have the technology to create, mold or machine Plutonium, almost no one has. Breeder reactors create Plutonium but it is impossible to machine or mold without using special alloys which, of course, are traceable during any nuclear explosion. North Korea has had two “nuclear” explosions and both have been traced.
Not one ounce of “North Korean” material was ever involved.
The 2006 explosion did have a nuclear signature, a North Korean explosion but an American nuclear signature. That there wasn’t something worse, an implosion based explosion or, worse, a thermonuclear device demonstrates a partially successful CIA operation with Pakistan’s A.Q. Khan and Valerie Plane to thank, heroes the Bush administration tried to hound to death. Why?