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On 16 August, 2012, miners on strike at the Lonmin platinum mine in Marikana, Rustenburg, South Africa, were assaulted by the South African Police Service. The assault, which used excessive force, resulted in the massacre of 34 miners. The documentary, Miners Shot Down, by Rehad Desai, relates the events in detail from the perspective of an eyewitness. See this Wikipedia post as well.