OTTAWA - Are North American governments secretly conspiring to build a "NAFTA superhighway," four football fields wide, from Mexico to Canada, to bypass regulatory controls and whisk goods swiftly to market? If you believe some right-wing websites in the United States, it's all but a fait accompli. They insist a gargantuan project is in the works that will carve a 365-metre-wide swath through the continent's heart, with 10 traffic lanes, rail lines for freight and passenger trains, fibre-optic cable lines and pipelines carrying oil, gas and water. Conservative commentators Pat Buchanan and Phyllis Schlafly, and websites such as WorldNetDaily, link...