With a cast of witnesses that includes former Secretary of State Henry Kissinger, TV hostess Barbara Walters, David Rockefeller, Annette de la Renta, the wife of designer Oscar de la Renta, former United Nations boss Kofi Annan, former head of the Metropolitan Museum of Art, Philippe de Montebello, and Vanity Fair's editor Graydon Carter - all friends of Brooke Astor - the trial is a top-drawer social event.