The Pacific Ocean is very, VERY large. We’re not talking about Iraq shooting at neighboring Israel here.

I personally think that to worry about Korea bombing the Western United States is to grossly underestimate our military preparedness, especially when we’ve faced such a threat before and have vastly superior real-time surveillance assets. The reason why the World Trade Center attack was successful was in part because civilian aircraft were used. A large missile is much more conspicuous and easier to spot, especially given that we’re constantly looking for it.