a child alert system reaches millions of people within minutes. when a public child alert is issued by the police, the picture of the child is distributed to a much larger audience. a child alert system may use the following components: tv and radio, highway signs, google child alert (also called google amber alert in some countries – already active in the us; there are developments in europe), online banners and advertisements, large tv screens, sms-text messages with photo, pc pop-ups, facebook, twitter, apps, website pop ups and banners, pc screensaver, e-mail, posters, rss news feed, mobile websites, screens in public transport (buses and trains), screens in railway stations, airports, shopping malls, supermarkets and cinemas.