But can we really afford to hope their tests are fizzles? I'm of the opinion that we will have to do something. Unfortunately there are no good options here.
I'm not saying they don't have nuclear devices and wouldn't try using them. They already are, in effect, using them to threaten and blackmail. My point is they aren't capable of doing what they claim about miniaturization and missiles. The device would be too bulky for an ICBM.
It's likely the early devices they constructed were similar to the 'Thin Man' we were developing in the 1940s. The results demonstrated similar characteristics. Yes, it works, but the yield will be much lower than the fissile material's potential. It'll also be very 'dirty' and create a lot of fallout. It's probably why they've done everything underground.