What if this nutcase fires off a ICBM nuke somewhere far out within international waters ? Is that not the next progressive step in his sequence of escalation ?
Although I wouldn't put anything past the PRNK, I would guess that they are years away from creating a war-head size nuclear device.
America tested it's first nuke, a comparatively low-tech nuke to what would later be developed, in 1944. It was 13 or 14 years later before we tested our first ICBM with a nuclear package. And, we were the richest country at the time dedicating a tremendous amount of manpower and money.
Even if they had help, I would think it would half a dozen years before they can make a weapon small enough, and light enough to put into the nosecone of their very small ICBM.