From the PPT, CPB doc:
May 31st, 1921, Tulsa, Oklahoma. The 'Negro Wall Street' district of the Greenwood neighborhood is bombed from the air.
Whites invade the enviable black business district, looting, burning, killing.
The police commandeer private planes. The 101st Airborne is flown in. A load of dynamite is dropped. 75 instantly killed. Hundreds of homes and businesses destroyed.
Four truckloads of bodies are shoveled into mass graves along the Arkansas river.
4,000 black men, women, and children arrested and placed in concentration camps, where they are required to carry 'passes'.
The city quickly re-zones the neighborhood so that the railroad can be run through, thus completing the destruction of that neighborhood.