If they develop a reliable nuclear bomb, I can see no reason they will not sell those, too.

The nuclear facility in Syria that was bombed had North Korean advisors, and resembled NK tech. North Korea has no problem whatsoever in proliferating whatever they have if the money is good.

Keep in mind that it doesn't have to be a nice, lightweight missile warhead to be useful to terrorists.

The "Greedo" dilemma:

Bush and his advisors, after 9/11, developed a policy that we should not wait until after we are attacked again to do something about rogue nations that might supply weapons to terrorists. This was an extreme position. It had many problems, and was very difficult, but it is inarguable that for nine years we weren't attacked again.

We aren't running under that policy any more.

Now the idea seems to be that we wait for them to take the first shot, then maybe somebody will be willing to do something drastic.

Until then, we can keep wasting time trying to talk lunatics out of lunacy. Morally, this seems like a better idea to many. Those who will eventually be taking that first shot in the teeth will not be complaining or voting afterwards. One small comfort: the first target will not be in the U.S.

We can hope that someone else comes in and saves our bacon, like Israel has done at least twice now. China could go into North Korea and solidly kick their asses, and nobody in China would be marching against their government's policies.