The challenge of forgiveness When both the Lockerbie bomber and disgraced quarterback Michael Vick were released back to society, some people were outraged. But one scientist suggests that we have evolved to forgive, alongside biblical traditions of redeeming sins.9:06 a.m.
Michael McCullough: Professor in the psychology and religious studies department at the University of Miami. His latest book is "Beyond Revenge: The Evolution of the Forgiveness Instinct."
Anthony Stevens-Arroyo: Professor Emeritus from Brooklyn College and ex-Director of the Program in Studies of Religion. He currently writes for the Washington Post's "On Faith" blog.
Singer Dar Williams and the Promised Land Dar Williams' witty lyrics and feminist folk rock sensibility have made her a star singer/songwriter of the folk festival circuit during her 15-year career.10:06 a.m.
Dar Williams: Singer/songwriter with more than a dozen albums under her belt. Her latest album is called "Promised Land."