Is Daniel Libeskind getting edged out of the WTC project. No, writes Justin Davidson. Hiring Santiago Calatrava to design part of Libeskind’s vision is inspired. “If Libeskind is the great enshriner of memory, Calatrava is a poet of forward motion. His best buildings seem to be poised in the instant before taking flight. Straining yet serene, as fast and frozen as a comic book swoosh, they look like icons of weightlessness. Almost a century ago, a group of Italian artists-ideologues who called themselves the Futurists published a polemic in which they declared ‘that the splendor of the world has been enriched with new forms of beauty, the beauty of speed.’ The Futurists approved of little, but they might have loved Calatrava.”