Garen Wintemute, a professor of emergency room medicine and director of the Violence Prevention Research Program at the University of California–Davis, is one of a handful of U.S. researchers brave enough to tackle the problem of gun violence. He tells Tiffany O'Callaghan why it is so hard to make inroads. Tiffany O'Callaghan: How bad is gun violence in the U.S.? Garen Wintemute: It takes upwards of 30,000 lives a year and injures another 75,000. We spend $100... (GunPolicy.org)