Christiane Amanpour reports on the genocides of the 20th and 21st centuries, ranging from Armenia in the early 20th century to the Holocaust to present-day Darfur, plus Bosnia, Cambodia, Iraq and Rwanda. Included: the story of Raphael Lemkin, an anti-genocide activist in the 1940s and '50s; and remarks from Father Francois Ponchaud, a Catholic missionary who tried to publicize the Cambodian genocide of the 1970s, former secretary of state George Shultz and Rwandan president Paul Kagame.