On May 31, 1921, the Greenwood District of Tulsa, Oklahoma was a thriving city within a city -- a symbol of pride, success and wealth. The next morning, it was ashes. What happened remained a secret for almost a century. Voices featured in this trailer include: KalaLea, Chief Eguwale Amusan, Quraysh Ali Lansana, Raven Majia Williams, and Dr. Tiffany Crutcher. The first episode drops Friday, May 28. Subscribe now.