Max Pearson presents a collection of this week's Witness History episodes from the BBC World Service.

We hear how a shocking photo from a Bosnian concentration camp stunned the world, what it's like to be in a tornado and the heroic clown who helped after an earthquake in Peru.

Plus the 1980 military coup in Suriname and the moment in the 1960s when African de-colonisation might have led to a United States of Africa.

This programme contains descriptions of sexual violence.

(Photo: Fikret Alic in a Bosnian refugee camp. Credit: ITN/Shutterstock)