Jon Sobrino, a Spanish-born Jesuit theologian, has spent the past 50 years in El Salvador. He is the author of many works, including the award-winning 2-volume Christology, "Jesus the Liberator," as well as "Where is God?: Earthquake, Terrorism, Barbarity, and Hope," and Witnesses to the Kingdom: The Martyrs of El Salvador and the Cricified Peoples."