For gun control advocates, it sure sounded like a great idea. Why not force gun purchasers to fire a round at the police station so that the ballistic "fingerprint" of the firearm could be catalogued? That way, police could find the perpetrator every time a gun was used in a crime. What could go wrong? Plenty, according to the Baltimore Sun's Erin Cox. Fifteen years, millions of dollars, and 340,000 shell casings later, Maryland decided last week to scrap the system... (GunPolicy.org)