ALLEN, Texas (AP) — It took four minutes for a neo-Nazi with an arsenal of firearms to kill eight people and wound seven others at a Dallas-area shopping center before a police officer ended the rampage, likely saving untold lives. The massacre Saturday sent hundreds of shoppers at the Allen Premium Outlets scrambling for cover in shops, storerooms and closed hallways. Those killed included two elementary school-age sisters, a couple and their 3-year-old son, and a security guard who had helped others escape. Allen, a multicultural suburb of 105,000, is left as the latest U.S. community rent by an eruption...