Max Pearson presents a collection of the week’s Witness History episodes, all with an Argentine theme.

We find out more about the 1985 ‘trial of the juntas’ when the country’s former military leaders stood accused of torturing and murdering thousands of their own people. And we hear from historian Dr Victoria Basualdo about life in Argentina, both before and after the trial.

Also, the story of the grandmothers who championed the study of genetics to find their missing loved ones. And why tens of thousands of protesters took to the streets of Buenos Aires in 2015. Plus, the bizarre story of Eva Peron's disappearing corpse. And finally, more on the Argentine animator who Walt Disney wanted to hire.

Contributors: Luis Moreno Ocampo - prosecutor Dr Victoria Basualdo – historian, FLACSO, the Latín American School of Social Sciences Dr Victor Penchaszadeh – geneticist Agustina Paz Frontera – journalist and writer Domingo Tellechea – art restorer and embalmer Hector Cristiani – grandson of Quirino Cristiani

(Photo: Forensic anthropologist Clyde Snow giving testimony to the trial, 1985. Credit: Daniel Muzio/AFP via Getty Images)

Max Pearson presents a collection of the week's Witness History episodes including the story behind Mick Jagger and David Bowie's duet for Live Aid in 1985 and the Chinese artist who was jailed for his art inspired by the Sichuan earthquake in 2008.

He speaks to music journalist Alice Austin to explore other concerts in world history that have had a political impact.

Also, the American politician who first coined the phrase "drill, baby, drill" in 2008, the making of Back To The Future in 1985 and the trophy killing of Cecil the Lion in Zimbabwe in 2015.

Contributors: Bernard Doherty - former Live Aid press officer. Alice Austin - music journalist. Ai Weiwei - artist. Prof Andrew Loveridge - zoologist who studied Cecil the lion. Michael Steele - the former Lieutenant Governor of Maryland, who came up with the slogan "Drill, baby, drill!" Bob Gale - the co-writer and producer of the Back to the Future.

(Photo: Mick Jagger and David Bowie performing Dancing In The Street. Credit: Brian Cooke / Redferns)

Max Pearson presents a collection of the week's Witness History interviews from the BBC World Service, all related to trains and journeys which have helped to shape our world.

Our guest Nicky Gardner, travel writer and co-author of Europe by Rail: the Definitive Guide, discusses the origins of train travel.

The first story involved the hijacking of a train in 1950s communist Czechoslovakia which was driven across the border into West Germany.

We also hear about Senator Robert Kennedy's funeral train in 1960s America, and Italy's "happiness train", which took children from the poverty stricken south to wealthier families in the north.

Contributors - Archive interview with Karel Ruml. Frank Mankiewicz - Robert Kennedy's former press secretary, and Rosey Grier, his former bodyguard. Bianca D’Aniello - a passenger on the “happiness train”. June Cutchins - received gifts from the Gratitude Train. Tomas Andreas Elejalde - general manager of the Medellin Metro.

(Photo: People stand near railroad tracks as a train carries the body of Robert Kennedy on June 8, 1968. Credit: Steve Northrup/The Washington Post via Getty Images)