HOUSTON- Former Enron Corp. chief executive Jeff Skilling surrendered to the FBI Thursday following reports that he had been indicted by a federal grand jury for his part in the collapse of the former energy trading giant. Skilling, 50, entered FBI headquarters in Houston accompanied by about six attorneys at 6:52 local time. Skilling has denied any wrongdoing, but news reports said he was named in a sealed indictment handed up to a federal magistrate on Wednesday. He is expected to appear in court later in the day. Citing personal reasons, Skilling resigned from Enron in August 2001, four months...