theregister.co.uk/2013/07/09/us_emergency_alert_system_still_flawed/
Remember, this one? Zombie alert? IF it was a missle, seems logical alert would have been nationwide- think Hawaii, Alaska, west coast.
EAS systems not always hacker proof. Targeted hack? If so, why Japan too? (Verified?) You have state EAS systems for state emergencies, so why was this Hawaii specific?
When EAS went to Internet, hacking vulnerability now possible.