Yep, it has to be North Korea. The combination of a completely mentally instable, ego-maniacal leader, 22 million starving desperate people, and nukes is definitley scary. Without nukes, or even with them, they have little chance of winning so what's to stop him from pushing the button?

After N. Korea has to be the U.S. Not only do we have the firepower but we have a President who likes to use it like its his own personal toys.