AP reports that the French Defense Minister (Mme. Michele Alliot-Marie) said today that the North Korean nuclear test on Monday must have been a "failed explosion" because the blast was apparently of "limited size."
Perhaps the French have inside knowledge. Perhaps the test did fail. Who knows ? Do the French really know something, or do they perhaps perceive an interest in saying the explosion was of "limited size" and "failed" because if the test was a fizzle, there is then less urgency to do anything about it ?
For an introduction to issues connected with nuclear weapons testing, have a look at the Global Security.org article here.