We "Cannot Walk Away" From Sandy Hook

Garen Wintemute, an emergency physician and director of the Violence Prevention Research Program at the University of California-Davis, is a pioneer in the study of gun violence as a public health issue. In his latest report, he argues that background checks should be required not just for licensed dealers, but for the roughly 40 percent of firearms sales that take place via private parties. That would mean requiring background checks for purchases at gun shows as well as for all sales between i...