The assassination attempt and mass killing in Tucson, Arizona, last Saturday was reportedly committed with a Glock 9 mm semiautomatic handgun equipped with a high-capacity magazine that held 31 bullets. The shock of having a member of Congress shot in the head at close range has led many Americans to wonder: Was it a mistake in 2004 for Congress to sunset the assault weapons ban, which, among other things, banned the manufacture or import of new magazines holding more... (GunPolicy.org)