The Columbine Mine massacre occurred in 1927, in the town of Serene, Colorado. In the midst of the 1927–1928 Colorado Coal Strike across the state, workers had been picketing one of the few remaining operating mines, in Serene.
The Columbine Mine massacre occurred in 1927, in the town of Serene, Colorado. In the midst of the 1927–1928 Colorado Coal Strike across the state, workers had been picketing one of the few remaining operating mines, in Serene.
Source: Wikipedia "Columbine Mine massacre" · CC BY-SA 4.0
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