Associated Press: The Gulf of Mexico oil spill shows that the United States should follow the example of South American socialists in nationalizing its energy industry, filmmaker Oliver Stone said Tuesday. The Academy Award-winning director of "Born on the Fourth of July" and "JFK" said that America’s country’s natural wealth was too important to be left in private hands, telling journalists in central London that oil and other natural resources "belong to the people." "This BP oil spill is …