Architect Santiago Calatrava has a winner in the transit station he has designed for the World Trade Center site, writes Blair Kamin. “That design, unveiled last month and expected to be finished in 2009, seems destined to become the finest piece of architecture at ground zero, head and shoulders above the awkward “Freedom Tower” that resulted from the stormy collaboration between architects David Childs and Daniel Libeskind. The transit station will simultaneously provide a grandly scaled civic gateway to lower Manhattan and the kind of light-washed, cathedral-like public space that Chicagoans and other visitors rave about in Milwaukee.”