But the current situation is more analogous to a D student getting a D on the big test. Their first nuclear tests were so weak that there was debate over what they even were, and they almost certainly did not represent a successful test of the intended bomb yield. This latest test was pretty definitely nuclear, but if it was a fusion weapon as claimed then it was again a major failure.<p>I&#x27;m not sure if any other nuclear weapons state has had such a string of failures. Both the US and USSR had successful full yields for their tests of their first fission and fusion bombs. China&#x27;s first fusion weapon test yielded over 3 megatons.<p>North Korea&#x27;s test yielded probably under 10 kilotons, and they&#x27;re going around bragging about an H-bomb. I&#x27;d say that deserves a D, at best.