World Trade Center site developer Larry Silverstein is in a bitter argument with Daniel Libeskind over fees the Libeskind firm says it is owed. “Even assuming that the Libeskinds do manage to come to terms with Mr. Silverstein before July 4, the episode has the potential to leave a bad taste in the mouths of Mr. Silverstein’s landlord at the World Trade Center, the Port Authority, which is in the process of evaluating whether or not to allow Mr. Silverstein to develop the rest of the buildings planned for the site.”