Dallas and Fort Worth, separated by 30 mi of suburbs, aren't exactly twin cities—they're more like cousins who squabble more than they get along. Their roots are different, yet intertwined. Dallas has almost always been a center of trade, built on the ideals of capitalism and progress—and great leaps of faith. Fort Worth's prosperity was established when the town became a stop on the Chisholm Trail, and continued when the city became a major railhead. The cattle that were herded through town more than a century ago still define the city, and its nickname,"Cowtown," persists.