What can we learn from the lessons of the Holocaust and genocide that took place in the past? What is the difference between genocide, war crimes, and crimes against humanity? Edward O'Donnell will explore these questions and more during his program "Preventing Genocide: Lessons from the Past" for the World Affairs Council of Central Illinois. O'Donnell served as the U.S. ambassador and special envoy for Holocaust Issues from 2003 to 2006. www.mywacci.org.