Business InsiderUS appeals court to hear arguments to stop AT&T purchase of Time-WarnerBusiness InsiderBy Diane Bartz. WASHINGTON (Reuters) - The U.S. Justice Department goes before an appeals court on Thursday to urge a three-judge panel to overturn a lower court ruling and order wireless carrier AT&T Inc to undo its $85.4 billion purchase of ...US Appeals Court Hears Arguments on Stopping AT&T Purchase of Time-WarnerU.S.