Isaac Mwase is currently a cancer-prevention fellow with the National Cancer Institute in Bethesda, Md. Previously he taught at Tuskegee University and Ouachita Baptist University in Arkadelphia, Ark. A native of Zimbabwe, Mwase was a pastor and editor there before coming to the United States. He earned a bachelor’s degree at Gardner-Webb University in Boiling Springs, N.C., and master’s and…