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Confused About Those Emergency Cellphone Alerts? Here's How They Work.

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Subway, cellphone, police

A woman checks her phone as New York police officers investigate a death on the subway tracks at the 79th St. station on March 26, 2013.

Credit: Reuters/Lucas Jackson

Many New York-area commuters on Monday were interrupted by this alert on their cellphones: "WANTED: Ahmad Khan Rahami, 28-yr-old male. See media for pic. Call 9-1-1 if seen."

From The Washington Post
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