Nothing in his Mr. Peepers demeanor reveals Stephen Teret's zeal and unfailing sense of aim. For two decades, this mild-mannered public-health professor and attorney has plugged away quietly in his Baltimore office, patiently but irreversibly changing the fundamental nature of the nation's gun-control debate. Officially, he is director of Johns Hopkins University's Center for Gun Policy and Research, but that stiff title doesn't convey the caginess with which he has... (GunPolicy.org)