THORNDALE, Texas - A pack of six dogs mauled a 76-year-old woman to death as she worked in her yard, authorities said. Lillian Loraine Stiles was riding on a lawn mower in her front yard Saturday when she was confronted by the dogs, described as pit bull-rottweiler mixed breeds, said Milam County Sheriff Charlie West. Investigators think Stiles was attacked when she got off the mower and headed into her house......