A convicted sex offender broke into a San Francisco home in the Ingleside district and raped a 9-year-old girl in her bedroom in an hourlong attack that ended when the girl's mother walked into the room, San Francisco police said. The man, police say, fled on foot and was chased by the girl's father, who at one point struck him with a 2-by-4. The man continued fleeing through several backyards and was captured by police and identified as Roberto Gamero, 36, of San Francisco, police said. "It's a parent's worst nightmare,'' said San Francisco police Deputy Chief Morris Tabak of...