Speakers this year included the usual politicians , including Attorney General Eliot Spitzer of New York , who spoke at several state commencements , and a string of governors speaking at less well-known state colleges ; human rights advocates like Sister Helen Prejean , who opposes the death penalty ; foreign dignitaries , including Juan Guzman Tapia , the Chilean judge who indicted Gen. Augusto Pinochet , the Chilean dictator ; actors like Viggo Mortensen ; and athletes like Lance Armstrong .