Photo shows a Hawaii Civil Defense Warning Device, which sounds an alert siren during natural disasters.
Photo shows a Hawaii Civil Defense Warning Device, which sounds an alert siren during natural disasters. Caleb Jones AP
Photo shows a Hawaii Civil Defense Warning Device, which sounds an alert siren during natural disasters. Caleb Jones AP

Older U.S. emergency alert systems may not be secure, researchers find

April 10, 2018 12:10 PM