We hear excerpts of some of our favorite shows from the past two decades, including Gore Vidal, Christopher Hitchens, Ron Reagan, Ursula K. Le Guin, Sara Paretsky, Julia Sweeney, Daniel C. Dennett, Anne Gaylor, Cecile Richards, Ernie Chambers, Steve Benson, Anthony Pinn, Brent Michael Davids, Janeane Garofalo, Leighann Lord, Ann Druyan and Donald C. Johanson.