From the archives: For Suicide Prevention Week, we rebroadcast an interview with Joan Wickersham, author of "The Suicide Index: Putting My Father's Death in Order." The book outlines Ms. Wickersham's efforts to understand her father's seemingly inexplicable decision to violently end his life - but the book goes beyond her particular personal story to address many of the difficulties that assail anyone who has experienced the pain of suicide in their lives.