TOPSHOT - People look at the 1921 Black Wall Street Memorial on the 100 year anniversary of the Greenwood massacre in Tulsa, Oklahoma, on May 31, 2021. - A century ago, in the southern US town, the arrest of a young Black man accused of assaulting a white woman sparked one of the worst outpourings of racial violence ever seen in the country. On May 31, 1921, after the arrest of Dick Rowland, hundreds of furious white people gathered outside the Tulsa courthouse, signalling to Black residents that a lynching -- a common practice at the time and until as recently as the 1960s -- was imminent. (Photo by ANDREW CABALLERO-REYNOLDS / AFP)