A knife-wielding man robbed a Texas woman and etched a "B" into her face after he saw a John McCain bumper sticker on the woman's car, Pittsburgh police said. Ashley Todd, 20, of College Station, Texas, was using an ATM at Liberty Avenue and Pearl Street in Bloomfield just before 9 p.m. Wednesday when a man approached her, put a knife to her throat and demanded $60, police said. Todd handed the man $60 she had in her pocket and stepped away from him, investigators said. The man then noticed the bumper sticker on the woman's car, which was parked...