We saw it with the massacre at Virginia Tech in 2007, with the rampage at Northern Illinois University a year later, and now with Saturday's mass shooting in Tucson. In each of these tragedies, the killer was a young man who, despite showing clear signs of mental illness, had no trouble purchasing a gun. Even the most staunch pro-gun advocate should be able to see the value in keeping deadly weapons out of the hands of people with severe mental illness. Yet, the... (GunPolicy.org)