SOWETO, SOUTH AFRICA - JUNE 16: A woman stands in silence in front of the memorial on which there is a picture of the activist Hector Pieterson carrying a wounded child as South Africans commemorate the 39th anniversary of the Youth Day in Soweto, South Africa on June 16, 2015. Youth Day on 16 June is a public holiday in South Africa and commemorates a protest which resulted in a wave of protests across the country known as the Soweto uprising of 1976. (Photo by Cornell Tukiri/Anadolu Agency/Getty Images)