What would new gun laws accomplish?

New gun laws in some states “appear to be the result of high emotion, not logic and clear thinking,” columnist Cal Thomas argued. “We all ache for the parents and loved ones of the Sandy Hook victims, but the Newtown tragedy shouldn’t be used as a prop for anti-gun proponents, the most extreme of whom want to register or ban all weapons except those for police and certain security people. What will more gun laws really accomplish? Will they keep one criminal bent on carnage from a single school door?”