Road plans in Texas have conspiracy theorists in an uproar I am driving along a mostly empty road in rural Fayette County, Texas, about an hour east of Austin, looking for the NAFTA superhighway -- the one that Stephen Harper, George W. Bush and Felipe Calderón mocked as a conspiracy theory when they were asked about it at their trilateral meeting in Montebello, Que., in August. Critics, who say that behind the leaders' denials lurks a larger, nefarious plan to unite North America, fear that such a roadway will eventually be a four-football-stadium-wide artery connecting Mexico, the U.S. and Canada,...