Hannibal B. Johnson’s Zarrow Mental Health Symposium keynote address, The 1921 Tulsa Race Massacre and Historical Racial Trauma. 
In this talk, Johnson explores historical racial trauma in the United States in general and Oklahoma in particular. He discusses how we must think critically about strategies for addressing the present legacy of historical racial trauma and pursue justice and healing. 

You may also listen here: https://anchor.fm/mentalhealthdownload/episodes/Hannibal-B–Johnsons-Full-Keynote-The-1921-Tulsa-Race-Massacre-and-Historical-Racial-Trauma—Zarrow-Mental-Health-Symposium-ekp6p9/a-a3fr3v6