Nate Burleson traveled to highlight a small town in South Carolina that protested a segregated bowling alley in 1968 and how it led to the killing of three students, now known as the Orangeburg Massacre. He sat down with someone who was there, Cecil Williams, a photographer and historian who captured the scene in the aftermath: "One of the saddest days I happened to be a part of." Their conversation airs tomorrow. | CBS Mornings