Hawaii is the first state to prepare the public for the possibility of a ballistic missile strike from North Korea.
The state's Emergency Management Agency on Friday announced a public education campaign about what to do. Hawaii lawmakers have been urging emergency management officials to update Cold War-era plans for coping with a nuclear attack as North Korea develops nuclear weapons and ballistic missiles that can reach the islands.
Starting in November, Hawaii will begin monthly tests of an "attack-warning" siren the state hasn't heard since the end of the Cold War in the 1980s. The wailing siren will be tested on the first working day of each month, after a test of an "attention-alert" steady tone siren with which residents are already familiar.