I see your point. However, I can't help but wonder if the presence of US military on South Korean soil is one of the primary motivations for North Korea to rush to further develop their weapons. Think about it from their point of view. The world's most powerful military amassing a large group of soldiers on a country that borders them. Further, we have had hostile relations with North Korea in the past. I aint saying its a good thing, just pointing out that it makes sense that they would work to develop nuclear weapons. We would do the same.