Edda Fields-Black discusses her contemporary symphonic work “Casop: A Requiem for Rice,” which tells the story of enslaved laborers on rice plantations in Lowcountry South Carolina and Georgia. She also previews her upcoming book about an often-untold story about Harriet Tubman. The first woman to lead men into battle in a major U.S. military operation, Tubman recruited spies, scouts, and pilots who guided 150 African American Union soldiers to rescue more than 750 blacks enslaved on rice plantations in the Combahee River Raid during the Civil War.