In its heyday, the Greenwood Neighborhood of Tulsa, Oklahoma was called the “Black Wall Street,” an exemplar of what a thriving community could like.  But that all changed.  And today, something different is coming into being, something that may be almost as radical.  Sermon “Whatever Happened to Greenwood?”      Rev. Denis Letourneau Paul “Vibrant” has to be one of the most overused words in…