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

We hear from Chilean politician Hermógenes Pérez de Arce, who helped oust President Allende in 1973. We also hear from the widow of folk singer Victor Jara, who was killed during the military coup.

Our guest is Dr Camila Vergara, who is a historian and journalist from Chile, and a senior lecturer at the University of Essex Business School in the UK. She tells us more about the aftermath of the Chilean coup, and its lasting impact.

Eva Franchell speaks about her friend, the Swedish foreign minister Anna Lindh who was murdered in 2003.

In the second half of the programme, campaigner Frank Heweston shares his experience on Greenpeace’s Arctic voyage to disrupt drilling on a newly built oil rig and we hear from a friend and promoter of Zanzibar’s most famous musician, Bi Kidude. Contributors: Camila Vergara - historian and journalist from Chile, and senior lecturer at the University of Essex Business School. Hermógenes Pérez de Arce – Chilean politician. Joan Jara – widow of Victor Jara. Eva Franchell – Anna Lindh’s former press secretary and best friend. Maryam Hamdani - friend and promoter of Bi Kidude.

(Photo: President Salvador Allende. Credit: Bettman/Getty Images)