Shriek! Texts on missing kids startle cell users - Article Photos 2/2

In this Thursday, Jan. 31, 2013 photo, an Amber Alert app is seen on the cell phone of Capt. Greg Gerrero of the California Highway Patrol in Sacramento, Calif. A new national Amber Alert system will automatically send alerts to millions of cell phones when an alert is issued in their area. The alerts are automatically active on most new phones and users will have to opt out if they do not wish to receive them. (AP Photo/Rich Pedroncelli)