Final answer:
Oklahoma was home to "America's Black Wall Street" until 1921, when the prosperous Greenwood neighborhood in Tulsa was violently attacked and destroyed.
Step-by-step explanation:
The state that was home to "America's Black Wall Street" until 1921 was Oklahoma. In Tulsa, Oklahoma, the Greenwood neighborhood was a prosperous African-American community known as the "Black Wall Street" due to its economic success. However, in 1921, the neighborhood was violently attacked and destroyed in what is now known as the Tulsa Race Massacre.