A sign that will mark the proposed corridor of Interstate 11 between Phoenix and Las Vegas sits on the edge of a parking lot overlooking Hoover Dam, Friday, March 21, 2014, at Hoover Dam, Ariz. Arizona governor Jan Brewer and Nevada governor Brian Sandoval gathered to unveil signs in a symbolic effort meant to keep up momentum on the project, which is coming of age in an era of scarce highway funding. (AP Photo/Julie Jacobson)
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