Yes, Daniel J. Neumann, I think the North Koreans are bluffing about 'nuking us,' if they have actually made such representations. To the extent that they can keep us on edge, they have achieved their purpose. I think we all know that if North Korean leaders ever actually launched a missile at us, the United States, they would be condemning their nation to oblivion. We, in America, Daniel J. Neumann live with a level of security, despite 9/11, that most other peoples of the world couldn't even dream about.
There's plenty of things to worry -- like who're we gonna nuke! But I wouldn't worry about that, us getting nuked.