Elaine Massacre: how a Black labor movement was met with a violent white mob – 360 video

In 1919, white mobs and federal troops killed hundreds of Black sharecroppers in Elaine, Arkansas, for organizing a union, and the story barely survived in public memory. Part two of Bayete Ross Smith's Red Summers series rebuilds the massacre in immersive 360 video from an archive most Americans have never seen.

Why it's free: Free on The Guardian's own channel; the paper published this Sundance Institute-backed project.