The land of the flighty

[Lissa]

I try not to underestimate the enemies of my nation, which includes the NK's. Why do you think that they were unable to procure the electronic tools and circuit design necessary to synchronize the detonations?

Occhi

The fuzes required are a lot more difficult to make. Likewise, the fuzes themselves are watched very closely by the US government because they know how they can be used. Those type of fuzes only have two uses, building demolitions and bombs (be they convention or non). While the NKs could threaten their neighbors, lobbing a nuke at the US with a missile is a lot more unlikely considering that they probably cannot get the minaturization necessary to do so. If they want to hit the US, it's going to have to be by ship and they're going to have to take a lot of subterfuge to hide that they are the ones doing it.