Doug and Worth Parker sit down with Rachel Lance, author of the book, In the Waves: My Quest to Solve the Mystery of a Civil War Submarine. Rachel is a biomedical engineer who specializes in patterns of injury and trauma. She is especially fascinated by blast and ballistic events, which eventually brought her to Doug. Rachel brings along her husband Nick for the conversation, which jumps from current events to historical gems.Make sure to get a copy of In the Waves. It's available at major online retailers.