Don’t panic. It’s only a test. A nationwide test, that is. At about 2:20 p.m. on Wednesday, every cellphone, television set and radio in the country will emit the familiar beeping noise associated ...

Remember that brief moment of icy fear that went down your spine every time you heard the start of an Emergency Broadcast System test? Well for United States audiences on Feb. 20, 1971, it seemed as ...

CLAIM: An emergency broadcast system test on Oct. 4 will send a signal to cell phones nationwide in order to activate nanoparticles such as graphene oxide that have been introduced into people’s ...

The initiative could help reach people in places lacking access to local news sources. The nation’s first artificial-intelligence-powered emergency broadcast system launched Wednesday in Florida, a ...