'Turquoise Palace' A True Political Murder Mystery

On Sept. 17, 1992, a group of Iranian and Kurdish opposition leaders were assassinated in a Greek restaurant in Berlin. Despite pressures to keep the investigation at the lowest possible level, a German prosecutor unraveled a tangle of threads that led to Iran's Supreme Leader himself. Host Scott Simon speaks with Roya Hakakian, author of the new book, Assassins of the Turquoise Palace.