John Shelton Reed, Cofounder of the Campaign for Real Barbecue, coauthor with his late wife, Dale Volberg Reed and William McKinney of “Holy Smoke: The Big Book of North Carolina Barbecue,” and author of “Barbecue: a SAVOR THE SOUTH® cookbook”, talks about the death of Wilber Shirley and the future of North Carolina’s traditional Pit cooked barbecue