CNET on Wireless Emergency Alerts: ‘They can range from very localized things, like an AMBER alert, to the President sending an alert to the entire country’

John Williams

The first test of the national wireless emergency system by the Federal Emergency Management Agency is shown on a cellular phone at the White House in Washington, Wednesday, Oct. 3, 2018. About 225 million electronic devices across the United States received alerts from FEMA Wednesday afternoon. (AP Photo/Susan Walsh)

Executive Editor and Head of News at CNET, Roger Cheng, explains the Wireless Emergency Alert system that led many Chicagoans to safety during the tornado Sunday night. He tells Jon Hansen why some received the alert and others may not have.

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