How often have you heard someone who has been through loss say they are living their lives to honor the person they lost? This impulse to give back ofter loss is powerful and pure. But the shape it takes varies, showing itself in unique and moving ways. For David Richman, the death of his sister from cancer led to a 5,000 mile bicycle trip to raise money and also to explore existential questions of life and death her illness had awoken in him. The result is a book about the people along the way who shared their thoughts and feelings with him, deepening his understanding of living and dying. His book, Cycle of Lives, shares their stories. What did he learn and how did his loss, grief and what came out of it change his life?