A credit card belonging to a Wall Street Journal reporter who mysteriously vanished while taking a walk from his New Jersey home on Saturday has since been used in Mexico, according to a report. Sources close to 55-year-old David Bird's family told NBC New York that his credit card was used across the border on Wednesday night. They said his family fears that his coverage of OPEC for the Journal may be connected to his disappearance. Bird, who is an energy markets reporter for the paper, was last seen at his home in Long Hill Township around 4:30 p.m., according...