Host Ben Kieffer talks with Hector Avalos, a former child evangelist preacher and now a professor of philosophy and religious studies at Iowa State University. Avalos will discuss his journey from preacher to now heading up the Atheist and Agnostic Society in Ames. Later in the hour, Ben talks with New York Times bestselling author Sam Harris. In his first book, "The End of Faith", Harris ignited debate about the validity of religion. His new book, "The Moral Landscape", sets out to tear down the wall between scientific facts and human values.