The gun lobby says Americans would be safer if more "good guys" carried loaded guns in public places, and extols the benefits of an armed citizenry. On Monday, the nation got a terrifying glimpse of how dangerous that vision really is — when a minor argument escalated into lethal violence at a movie theater in a Tampa suburb. In this tragic episode, an irascible patron at a matinee showing of "Lone Survivor" shot a fellow audience-member because he was... (GunPolicy.org)