When it comes to data on shopping habits or driving, it's all available and being constantly mined by advertisers and government offices who sell and legislate around it appropriately. But data around gun violence? There's almost nothing. And that had been by design – until now. Unveiled at the SXSW technology festival, a group of data scientists and activists have demonstrated for the first time a new way to predict and study gun violence using social media.... (GunPolicy.org)