By Carla HintonFaith editorchinton@oklahoman.comAbout 51 years ago, Robert Edison was part of a group of black students booted from Oklahoma Christian University in an incident tinged with racial undertones.This year, the longtime educator is returning to the private college — to teach OC's first African-American studies courses.Edison is OC's new Distinguished Visiting Professor of American Studies in Racial and Ethnic Diversity.Read more on NewsOK.com