In the wake of a mass shooting, a furious political debate inevitably erupts: Does gun violence stem from mental-health issues or from easy access to firearms? A policy solution that attempts to skirt the contentious divide is to make it harder for people with a history of mental illness to own a gun. A new Health Affairs study followed 81,704 adults with schizophrenia, bipolar disorder or depression who were receiving treatment through the public behavioral health... (GunPolicy.org)