Max Pearson presents a collection of this week's Witness History episodes from the BBC World Service. Our guest is Tony Kapcia, Emeritus Professor at the University of Nottingham's Centre for Research on Cuba. He tells us about the history of Cuban foreign policy.

We start with Aleida Guevara's memories of being sent from Cuba to provide medical aid in the Angolan Civil War during the 1980s. Then, the French scientist Francoise Barre-Sinoussi explains how HIV was discovered in 1983.

In the second half of the programme, we hear how Australian scientist David Warren invented the black box flight recorder in 1962, which made flying safer. An Ecuadorian politician explains how she tried to save the country's Yasuní National Park. And the actress Jane Seymour recounts how she played the role of Freddie Mercury's bride at the Fashion Aid event in 1985.

Contributors: Tony Kapcia - Emeritus Professor at the University of Nottingham's Centre for Research on Cuba. Dr Aleida Guevara - daughter of Che Guevara. Francoise Barre-Sinoussi - scientist who helped identify HIV. Jenny and Peter Warren - children of David Warren, inventor of the black box. Bill Schofield - former colleague of David Warren, inventor of the black box. Ivonne A-Baki - Ecuadorian politician tasked with saving the Yasuní National Park.

(Photo: Aleida Guevara with her father, Che, and Fidel Castro in 1963. Credit: Imagno via Getty Images)