Quick, somebody ask Nadin what they are going to mount those "nukes" on. Nothing in their underground tests indicates a nuclear device capable of being mounted on a missile. Nothing in thier previous ballistic tests or space attempts indicates fine control or re-entry capability necessary to hit something as small as San Francisco other than by purest of chance. If they actually have a nuclear bomb, their only real option to deliver it is to put it on one of their passenger jets and hope nobody notices it before it completes it's suicide run, which they might succeed in doing exactly once.
I also wonder if Nadin "wargamed" what happens when the North Korean invasion force gets to a grocery store.