As about 1000 other bloggers from here/germany blogged, my source was Spreeblick again, the Feuerwehr-Blog wants a lot of citizens to add entries named IN ("Im Notfall") to there mobiles phonebooks, so they now who should be called if something happened to you.
The initial source of this campaign is the british example initiated after the terror assassination on the tube in london. The fire brigade as well as the rescue service didn't know whom to contact for the victims.
Blog on!