Witness

At the end of WW2 much of Germany's capital had been destroyed by bombing and artillery. Almost half of all houses and flats had been damaged and a million Berliners were homeless. Caroline Wyatt has been speaking to Helga Cent-Velden, one of the women tasked with helping clear the rubble to make the city habitable again.Photo: Women in post-war Berlin pass pails of rubble to clear bombed areas in the Russian sector of the city. (Photo by Fred Ramage/Keystone/Getty Images)

At the end of November 1994, Norway voted in a referendum not to join the European Union. The issue had split the country, and Norway was the only one of four countries that had referendums on EU membership that year to vote against. A senior member of the Yes campaign, former Norwegian foreign minister and Labour politician, Espen Barth Eide, tells Louise Hidalgo about the night they lost.Picture: fishing vessels with banners reading "No to EU" in the harbour of Tromso two weeks before the referendum took place (Credit: Press Association)

The discovery of a nest of complete dinosaur eggs in Mongolia in 1923 provided the first proof that the prehistoric creatures hatched out of eggs rather than giving birth to live young. The American explorer who found them, Roy Chapman Andrews, became a legend and many consider him the inspiration for the film hero Indiana Jones. Claire Bowes spoke to his granddaughter, Sara Appelbee.Photo: Roy Chapman Andrews examining first find of dinosaur eggs by George Olsen, Mongolia, 1925 (courtesy of AMNH Research Library)Audio of Roy Chapman Andrews courtesy of Marr Sound Archives, UMKC University Libraries.

In 1982, Terrence Higgins became the first known British victim of a frightening new disease called HIV/AIDS. In his memory, his friends set up the Terrence Higgins Trust - now Europe's leading charity in the area. Simon Watts talks to his former partner, Dr Rupert Whitaker.PHOTO: Terrence Higgins (Courtesy: Dr Rupert Whitaker)

A personal account of the huge Antarctic industry which left whales on the brink of extinction. For centuries, whaling had been big business. Whale products were used in everything from lighting, to food and cosmetics. Hunting had decimated the whale population in the north Atlantic so in the early 20th century, Britain and Norway pioneered industrialised whaling in the Antarctic. Soon other nations joined in. At the time, there was little public concern about the morality of hunting whales and they were slaughtered at an astonishing rate. We hear from Gibbie Fraser, who worked on a whale catcher in the Antarctic in the 1950s and 60s, when the impact of decades of hunting finally brought an end to Britain's whaling industry.Photo: A whale on the flensing plan at Grytviken, South Georgia, 1914-17 (Photo by Frank Hurley/Scott Polar Research Institute, University of Cambridge/Getty Images)

In the early 1990s, Saddam Hussein ordered the draining of southern Iraq's great marshes. It was one of the biggest environmental disasters of the twentieth century and an ancient way of life, dating back thousands of years, was almost wiped out. In 2014 Louise Hidalgo spoke to Iraqi environmentalist Azzam Alwash, and to journalist Shyam Bhatia, who knew the area well. This programme is a rebroadcast.Photograph: An Iraqi Marsh Arab looks out across a barren stretch of the marshes of southern Iraq. (Credit: Essam al-Sudani/AFP/Getty Images)

In 1957, just four years after Stalin's death, 30,000 students from 130 countries attended the 6th International Youth Festival in Moscow, a two week celebration of 'Peace and Freedom' with music, dance, theatre and sports. British student Kitty Hunter-Blair remembers a unique moment for young Russians, who were allowed, for the first time, to talk freely to foreigners. Picture: Participants in the 6th International Youth Festival in Mayakovsky Square, on their way to Lenin stadium for the opening ceremony, July 28, 1957. Credit: Sovfoto/UIG via Getty Images.

The Palestinian leader Yasser Arafat died in November 2004. French doctors treating him at the military hospital in France where he died said Arafat had an unidentified blood disorder and gave the cause of death as a stroke. Since then there have been allegations that he was poisoned. Leila Shahid was the Palestinian ambassador to France in 2004, and was with Yasser Arafat during his final days. She's been talking to Louise Hidalgo about that time.Picture: Yasser Arafat attending Friday prayers at his headquarters in Ramallah a year before his death (Credit: Antoine Gyori/AGP/Corbis via Getty Images)

What did Lee Harvey Oswald do for two years in the Soviet city of Minsk? And why did the American authorities let him return without any fuss in 1963? A few months later he would be arrested for shooting the US President. Vincent Dowd has been listening to archive accounts of Oswald's time in the USSR and speaking to Anthony Summers who has written about the assassination of President Kennedy.Photo: Lee Harvey Oswald on November 22,1963, during a press conference after his arrest in Dallas. Credit: AFP/Getty Images.

During the last years of World War Two, the American government began hiring poor Mexicans to come to work legally on US farms. The scheme was known as the 'Bracero' programme and lasted until 1964. Mike Lanchin presents archive recordings of some of those involved in the programme, using material collected by the University of Texas at El Paso. Photo: A group of Mexican Braceros picking strawberries in a field in the Salinas Valley, California in June 1963 (Getty Images)

A man recorded by the BBC shares his memories of the funeral of the Duke of Wellington in 1852. The Duke was given a state funeral after defeating Napoleon at Waterloo in 1815. The British General was credited with preventing Napoleon Bonaparte from establishing a European empire. Frederick Mead was just five when he went with his parents to watch the funeral procession go by.PICTURE: The Duke of Wellington. Oil on canvas (photo by Imagno/Getty Images)

For decades disabled people in the UK were offered tiny, three-wheeled, turquoise cars as their main form of transport. They were known as Invacars and they were provided, free of charge, to people who couldn't use ordinary vehicles.They were phased out in the 1970s because they were accident-prone and people were given grants to adapt conventional cars instead. Daniel Gordon has been hearing from Colin Powell, who was issued with his first Invacar at the age of 16.Photo: an Invacar. Credit: BBC

When WW2 was over, a fanatical group of Japanese immigrants living in Brazil refused to believe that Japan had lost the war. They decided to punish their more prominent compatriots who accepted that Japan had lost. The extremists killed 23 people. Aiko Higuchi remembers the tragic day in February 1946 when her father became their first victim.Photo: Some members of Shindo Renmei (Tokuichi Hidaka is the first from the right) in picture taken by Masashigue Onishi in Tupã, state of São Paulo, Brazil, in the beginning of 1946, before the killings. Credit: Masashigue Onishi/Historical Museum of Japanese Immigration in Brazil

In November 1979, Iranian students seized the American embassy in Tehran after Washington agreed to allow the deposed Shah into the US for medical treatment. It would be more than a year before the US embassy hostages were released and the crisis irreparably damaged American-Iranian relations. Louise Hidalgo has been talking to diplomat Henry Precht, head of the Iran desk at the US state department during those tumultuous months who argued against letting the exiled Shah enter America.Picture: protestors in New York demonstrate against the admission of the Shah of Iran into a New York hospital (Credit: Michael Norcia/Sygma/Getty Images)

Pearl Unikow was a young woman who grew up in a segregated Jewish community in Russia before WW1. Her stories, recorded in Yiddish in the 1970s, provide a rare account of traditional Jewish life. Her granddaughter Lisa Cooper wrote a book based on those recordings. Dina Newman has been listening to the tapes and spoke to Lisa Cooper. Photo: Pearl Unikow (in the middle of the back row) with her cousins, circa 1920. Credit: family archive.

On a hot summer day in 1971, six armed men invaded the house of former Congressman Rubens Paiva in Rio de Janeiro. He was taken from his wife and children, never to be seen again. Paiva was one of the most famous Brazilians to disappear during the military dictatorship. His son, writer Marcelo Rubens Paiva, tells how his family coped with decades of lies, uncertainty and, finally, the truth.Photo: Rubens Paiva surrounded by his family (his son, Marcelo, is seated cross-legged). Credit: Family Archive

After four years of war Germany was on the verge of defeat. Its armies were exhausted and in retreat, its civilian population enduring hardship and hunger. As unrest grew at home, the German government and military struggled to maintain control. The German Kaiser was forced to abdicate. Germany became a republic. Hear first-hand accounts from the BBC archive of how the disastrous end to the First World War provoked revolution in Germany. Photo: Revolutionaries in a truck with machine guns in front of the Brandenburg Gate in Berlin, November 1918 (Photo by Culture Club/Getty Images)

During World War One, two British nurses set up a first aid station just a few hundred metres behind the trenches of the Western Front. Mairi Chisholm and Elsie Knocker became known as 'the Madonnas of Pervyse'. Mairi Chisholm spoke to the BBC in 1977, Lucy Burns has been listening to her story.(Photo: Mairi Chisholm (left) and Elsie Knocker. Courtesy of Dr Diane Atkinson, author of Elsie and Mairi Go To War)

At the start of World War One, British and German colonial forces went into battle in East Africa. Tens of thousands of African troops and up to a million porters were conscripted to fight and keep the armies supplied. Alex Last brings you very rare recordings of Kenyan veterans of the King's African Rifles, talking about their experiences of the war. The interviews were made in Kenya in the early 1980s by Gerald Rilling with the help of Paul Kiamba.Photo: Locally recruited troops under German command in Dar Es Salaam, Tanzania (then part of German East Africa), circa 1914. (Photo by Hulton Archive/Getty Images)

It was one of the defining battles of the First World War.Britain and its allies had ambitious plans to break through German lines - but they ended up mired in mud.Listen to the voices of soldiers who took part - from the BBC archive.Photo: Getty Images.