I don't think NK did it, but a nation-state, just like any other entity driven by self-interest, would go after ANYTHING they felt would give them an advantage.

I don't think NK did it, but a nation-state, just like any other entity driven by self-interest, would go after ANYTHING they felt would give them an advantage. Including actions they can use to sway public opinion in their favor (or against the favor of their enemies) or garner sympathy for themselves.