Yep they did. It was someone hitting the wrong button.
The false alert of a ballistic missile attack that unleashed panic across Hawaii was triggered when a state employee accidentally hit the wrong button on a computer, an official said.
www.wsj.com
On Saturday morning, just after 8 a.m. local time, a Hawaii state employee hit the wrong button on a computer during a shift change and accidentally sent an alert to many of the state’s cellphones that a ballistic missile was about to strike. For nearly 40 minutes, scores of Hawaii residents thought their world was about to end.