One hundred years ago Monday, arguably the worst racial conflict in U.S. history broke out in Tulsa, Oklahoma – in a section of town called the Greenwood District, where Black folks lived and prospered. Booker T. Washington himself coined a nickname for the area: Black Wall Street. For decades, what happened in Greenwood was referred to as a race riot, but no longer – what happened that day was no riot. It was an attack on the Black community by an armed and organized white mob.