Fresh off an oil-boom, the black residents of Greenwood, Okla. built a booming community known as The Negro Wall Street. But in May of 1921, that all changed. Word spread that a lynch mob of white people were heading to a courthouse to kill a black man accused of accosting a white woman in an elevator. United, the African-Americans marched, prepared to defend his innocence. The Tulsa Race Riots would soon commence and later be known as one of the most egregious attacks against African-Americans.