Sixty-four-year-old Vivian Westerman rode out Hurricane Katrina in her 19th-century house. So terrible was the experience that she wanted two things before the 2006 season arrived: a backup power source and a gun. "I got a 6,000-watt generator and the cutest little Smith & Wesson, snub-nose .38 you ever saw," she boasted. "I've never been more confident." People across New Orleans are arming themselves - not only against the possibility of another storm bringing anarchy, but against the violence that has engulfed the metropolitan area in the 19 months since Katrina, making New Orleans the nation's murder capital.