You are thinking of a single burst centered over the country 250 miles up. In that you would be correct. But what I said was 4-5 nukes and cited specific areas. Please go back and look at my original post.
he'll only get ONE chance, he has to make it count and do as much damage as he possibly can
that and what airliners can he use? it's not like Air Koryo has scheduled flights to the US or do you mean smuggling nukes on to other carriers?