At the risk of once again “underplaying” events as I’m apparently want to do, it appears the NKs aren’t such good bomb builders. From CNN (no specific link yet, just on main page):
The U.S. believes North Korea tried to detonate a nuclear device and "something went wrong," a government official told CNN Tuesday. The official confirmed North Korea told China before the test that it would be a 4 kiloton device. The official added the unexpectedly small blast, of a half kiloton or less, indicates the test was not very successful.Or it was a complete fake. Either way, North Korea isn’t your daddy’s Red Menace.