The memories of the brother of one of the victims of the Columbine mass school shooting; plus the story behind 'A Raisin in the Sun' - the first play on Broadway by a black woman; the world's first space tourist, the origins of organic farming and the auto-destructive art movement of the 1960s.
Photo: Students from Columbine High School run under cover from police, following a shooting spree by two masked teenagers. April 20th 1999 (Mark Leffingwell/AFP/Getty Images
The rise of Hindu nationalism
How an Indian religious rally in 1990 sparked the rise of Hindu nationalism, 100 years since the Amritsar Massacre plus the first wing-suit for base jumping, a US food scare in the 1960s and teaching Marilyn Monroe to dance.
(Photo LK Advani during rath yatra 15/10/1990 Credit: Getty Image)
Abolishing the army
After a brief civil war in March-April 1948, the new president of Costa Rica, Jose Figueres, took the audacious step of dissolving the Armed Forces. The Central American country is now one of just over 20 countries without a standing army - we find out more. Plus, Maya Angelou's ground-breaking memoir, I Know Why The Caged Bird Sings, and the remarkable story of the raising of the Swedish warship, the Vasa.
Photo: Costa Rican soldiers in San Jose after the end of the civil war, April 1948 (Credit: Getty Images)
Drama in the British parliament
Prime Minister Jim Callaghan's desperate attempts to survive a no-confidence motion in 1979, the record-breaking 20-day balloon flight around the world; plus the Nazi past of Kurt Waldheim, mindfulness and the first home pregnancy test.
Picture: James Callaghan outside 10 Downing Street (Fox Photos/Getty)
Autism and the MMR vaccine
How a British doctor misled the world by linking the MMR vaccine to autism; the early rise of Hungary’s Viktor Orban also what it was like to contest the Soviet Union’s first multi-party elections plus the exposure in the 1970s of a Nazi criminal in Holland and uncovering Mexico’s Aztec past.
Photo: Dr Andrew Wakefield arrives at the General Medical Council in London to face a disciplinary panel, July 16th 2007
(Daniel Berehulak/Getty Images)