The al-Qaeda terrorist group, which has long eyed ways of interfering with the oil and gas industry, continues to threaten world peace. But it is hardly the only show in town, as one expert has recently testified.John Robb, the author of a respected new book on terrorism, last week warned in Oklahoma City that extremists of the future will attack oil refineries, natural gas pipelines, and other targets that provide vital systems to society.“You can make these attacks far removed from where we’re at, and because of all the systems being interconnected it will have an impact on us,” Robb said in an interview with the Oklahoman newspaper.The man has earned his stripes, too....