It’s more likely that North Korea needs more food and fuel aid, especially with winter approaching, and wants to threaten everyone back to giving them concessions.

And what, exactly, are they going to do if we don’t give them aid? Start a war with South Korea? The people in Seoul won’t be lucky, but North Korea won’t survive a war. Nuke Los Angeles? Can I suggest adding in San Fransisco too? Pyong-yang will be a crater as well.