The Westfield Group made it official yesterday: They will be curating the 450,000 square feet of retail space at the World Trade Center, the New York Post reported. The group made a $93 million payment to the Port Authority toward the $612.5 million deal that will bring retail to the podia of Towers Four and Three, the transportation hub, and along Church & Dey streets. If all goes as planned, an additional 90,000 square feet will be added in Tower Two as well, but first an anchor tenant for Tower Three seems to be the most pressing bit of unmet business.