"State officials are postulating a possible 15-kiloton North Korean nuclear device detonated 1,000 feet above Honolulu, which would be survivable for the vast majority of the state’s residents. For comparison, the bomb dropped on Hiroshima in 1945 also was 15 kilotons." It would be both foolish and ignorant to believe that the yield would be as small as 15 kt.  They are not using 1945 technology - their size is primarily dependent upon the amount of plutonium they can enrich.  Given time, they will be in the mt range.  Their enrichment facility is working 24 x 7.  In the end, the current steps taken by our civil servants are a complete waste of time and tax payer dollars and leave a false sense of security to the public.  Shame on them!