BOSTON (Reuters) - Two men broke into Republican presidential hopeful Mitt Romney's Boston campaign headquarters early on Thursday, the second break-in of the offices in five months, a spokesman for the local prosecutor said. Boston police arrested Daniel Bradley, 28, and Michael Sauer, 30, as they tried to leave the office complex's parking lot. A security guard spotted them trying to steal computers on a surveillance tape and called police, said Jake Wark, a spokesman for the Suffolk County District Attorney. "There was some computer equipment that was recovered. There is no indication this was politically motivated," Romney spokesman Eric...