Capitol Hill (CNSNews.com) - If the United States had a federal law requiring so-called "ballistic fingerprinting" of every firearm in the country, could police have already caught the murderer coming to be known as the "Beltway sniper?" That is the assertion in a message sent to supporters of the group formerly known as Handgun Control, Inc. "As police try to track down and stop this killer, we do know this: sensible gun laws can help law enforcement solve crimes as well as prevent gun violence," wrote Sarah Brady, chairwoman of the Brady Campaign. Brady noted that ballistic comparisons of the...