In 1996, Congress passed the Dickey Amendment, effectively banning government research on gun violence. But these days, former Republican representative Jay Dickey sees his namesake amendment for what it was: A mistake. "I wish we had started the proper research and kept it going all this time," Dickey told The Huffington Post last year. "I have regrets." Now, a research letter published as part of a series on firearm violence in the journal JAMA Internal Medicine... (GunPolicy.org)