Gun violence must be treated as a public-health issue — such as alcohol, smoking and traffic — say people concerned about gun-related death rates from mass shootings and random shots nationwide. "Guns are where tobacco was in the 1950s," said Garen Wintemute, director of the Violence Prevention Research Program, who practices emergency medicine at the University of California at Davis School of Medicine. "There's a little bit of science and a great deal of... (GunPolicy.org)