Growing up, the Emergency Broadcast System was a kind of sonic boogeyman. Its signature harsh tone would cut through your favorite TV show or song on the radio, announcing that “THIS IS ONLY A TEST”.

Add Yahoo as a preferred source to see more of our stories on Google. CLAIM: An emergency broadcast system test on Oct. 4 will send a signal to cell phones nationwide in order to activate ...

WASHINGTON — Around 2:20 p.m. Eastern Time (or a little closer to 2:18 p.m. Eastern) on Wednesday, Oct. 4, millions of cellphones, TVs and radios across the country sent out an alert as part of a ...