FEMA Wireless Emergency Alert: Why your iPhone’s alarm will sound at 2:20pm ET

Macworld
In the U.S., the Federal Emergency Management Agency (FEMA) works with the Federal Communications Commission (FCC) on the Integrated Public Alert & Warning System (IPAWS). IPAWS is used to alert U.S. citizens of emergency situations through mobile phones, radios, and television.Have you ever been watching TV, and then suddenly you see an alert graphic on the screen, and hear a long tone, followed by a voice saying, “This is a test. This is a test of the emergency broadcast sys