Witness

On 21 August 1986 villagers in the north-west of Cameroon awoke to find that many of their friends and neighbours had died in their sleep. More than 1,700 people and much of their livestock are thought to have perished as a result of unexpected volcanic activity under Lake Nyos, which produced a cloud of deadly carbon dioxide. Tim Mansel spoke to two scientists who went to find out how it had happened. Photo: Dead livestock near Lake Nyos (Peter Turnley/Corbis/VCG via Getty Images)

The League of German Girls was the girl's wing of the Nazi party's youth movement, Hitler Youth. Open to girls aged ten years upwards, it was a key part of the Nazi plans to shape a new generation of Germans. Caroline Wyatt travels to Berlin to meet Eva Sternheim-Peters, now 93, who joined the League at the age of ten and rose to be one of its leaders. Photo: Eva Sternheim-Peters at home in Berlin (Credit: Stefan Thissen)

The Spanish town of Benidorm is now one of the world's most popular holiday resorts - receiving more than 10 million visitors a year. The hotels and skyscrapers are the vision of Benidorm's mayor in the 1950s and 60s, Pedro Zaragoza. Zaragoza personally convinced Spain's dictator, General Franco, to allow more tourism - and to allow sunbathers to wear the bikini. Simon Watts introduces the memories of Pedro Zaragoza, as recorded by Radio Elche Cadena Ser shortly before his death.PHOTO: A busy day at Benidorm (Reuters)

Among the leading Nazi inmates in Berlin’s Spandau prison, which was closed in August 1987, was Hitler's architect and minister of war, Albert Speer. He was the only top Nazi who later apologised for the Holocaust, although he claimed he never knew it was happening. Louise Hidalgo has been speaking to the journalist Roger George Clark, who interviewed Speer a decade after his release at his home in West Germany. Picture: Albert Speer standing at the gate of his house near Heidelberg in December 1979. (Credit: Roger George Clark)

The story behind the groundbreaking autobiography of a woman who grew up in 19th century pre-colonial Nigeria. The book is the story of Baba a Hausa woman, who lived in the farming hamlet of Karo, when the region was part of the Islamic empire, the Sokoto Caliphate. Baba's account was written down by an English woman, Mary Smith, in 1949, while she was working in northern Nigeria with her husband, the anthropologist, M.G Smith. The book became a key text in studies of pre-colonial Africa. Alex Last has been speaking to Mary Smith about her memories of Baba.Photo: Baba as an old woman in northern Nigeria in 1949 (credit: Mary Smith)

Sales of alcohol in the USSR were severely limited in 1985 in a bid to fight drunkenness. But the anti-alcohol campaign was abandoned three years later when the Soviet economy was in trouble, and the government need more taxes. Dina Newman discussed the reasons for the campaign's failure with the former advisor to the Central Committee of the Communist Party, Alexander Tsipko. Photo: A Soviet anti-alcohol poster; Credit: Fine Art Images/Heritage Images/Getty Images.

A former student, Olda Cerny, tells Alan Johnston about how he made a desperate appeal for the support of the outside world as invading Soviet tanks rumbled through the streets of the Czechoslovak capital in August 1968. This programme was first broadcast in 2010.Picture: Soviet troops in Prague (Getty Images)

An intriguing story from West Germany in August 1988, of a bank robbery, a three-day car chase that had the country holding its breath, and a journalist who got a little bit too close to the story. Tim Mansel has been hearing from one of the people at the centre of this crisis, journalist Udo Roebel.Photo: Holding a weapon in his hand, kidnapper Hans-Jürgen Rösner calls on journalists and spectators to free the way in the city of Cologne, August 1988 (Press Association)

In August 1958 the Japanese entrepreneur, Momofuku Ando, came up with the idea of a brand new food product that would change eating habits of people across the world. Ashley Byrne has been speaking to Yukitaka Tsutsui, an executive for the company founded by Ando, about the birth of the Instant Noodle.Photo: 'Space Ram' instant noodles for astronauts (YOSHIKAZU TSUNO/AFP/Getty Images)

The apartheid government finally launched a TV service in 1976. For years the Afrikaner dominated government had opposed the introduction of television, believing it would undermine the Afrikaans language, culture and religion. Alex Last has been speaking to two people involved in the launch, presenter Heinrich Marnitz and sound engineer, Dave Keet. Photo: South Africans gather around their new TV set in 1976 (BBC)

In 1969 photo journalist Moneta Sleet became the first African American to win a Pulitzer Prize for journalism. He won for the black and white image of Coretta Scott King the widow of Martin Luther King taken at the funeral of the murdered civil rights leader. Farhana Haider has been speaking to Moneta Sleet's son Gregory Sleet about his father's remarkable career capturing many of the images that defined the struggle for racial equality in America.Photo: Moneta Sleet's Pulitzer Prize winning photo of Coretta Scott King and daughter Bernice. Credit. Getty

During WW2 the feminist and writer, Vera Brittain, spoke out against the saturation bombing of German cities. Her stance won her enemies in Britain and the USA. Vincent Dowd has been speaking to her daughter Shirley Williams about the impact of her campaign.Photo: Vera Brittain at Euston Station, London, in 1956. Credit: Central Press/Hulton Archive/Getty Images

In August 1994 Yitzhak Rabin became the first Israeli leader publicly to visit Jordan. But in fact talks had been going on for years. Former head of Mossad, Ephraim Halevy, was Israel's secret peace envoy. He's been telling Louise Hidalgo about Rabin and King Hussein of Jordan's clandestine meetings during the often fraught road to peace.Picture; US president Bill Clinton looks on as King Hussein and prime minister Yitzhak Rabin shake hands on the White House lawn in July 1994 ahead of a formal peace treaty between Israel and Jordan later that year. (Credit: Mark Reinstein/Corbis via Getty Images)

At a time of a bitter ethnic conflict between Armenia and Azerbaijan in 1988, two villages managed to escape violence by swapping homes with each other. Bairam Allazov, an Azeri, and Ishkhan Tsaturian, an Armenian, told the BBC about how they managed to guide their neighbours and families to safety as war broke out in the Caucasus.Photo:Photo: Bairam Allazov (l) and Ishkhan Tsaturian (r). Credit: BBC

In 1954 Guatemala's left-leaning President Jacobo Arbenz was ousted from power by army officers backed by the CIA. In 2016 Mike Lanchin spoke to his son, Juan Jacobo Arbenz, about the events of that time, and the effects on his family.Photo: Jacobo Arbenz and his wife speaking with a group of French reporters in Paris in 1955. Credit: Getty Images

In 2003 Iran agreed to let officials from the International Atomic Energy Agency into the country to look at its nuclear facilities. Olli Heinonen was one of the inspectors tasked with trying to establish whether or not Iran was trying to develop nuclear weapons. He's been speaking to Tim Mansel about what they found.Photo:The Iranian nuclear power plant of Natanz, south of Tehran.(Credit:Henghameh Fahimi/AFP/Getty Images)

In 1998 brown bears were declared a protected species in Bulgaria and the ancient tradition of forcing them to dance for people's entertainment became illegal. Farhana Haider had been speaking to Dr Amir Khalil, a veterinarian who helped establish a bear sanctuary in Bulgaria to look after the retired animals.Photo: Brown Bear. Copyright: EPA

In July 2007, a standoff between monks and the Welsh government made headlines around the world. At issue was the fate of Shambo, a sacred bull which had tested positive for bovine tuberculosis. Shambo was eventually removed by police during a religious ceremony and taken away for slaughter. Simon Watts talks to Swami Suryananda, one of the monks who fought to keep the bull alive.PHOTO: Shambo (Press Association)

In 1916, Britain introduced conscription for the first time. But thousands refused to be part of the war effort. The government allowed people to apply for exemption on the basis of conscience. Those that did faced public hostility and abuse. Many conscientious objectors were pacifists, members of Christian groups, like the Quakers, or those who felt the war was wrong on political or moral grounds. The majority accepted service in non combat roles, But thousands refused to have any part in the war effort and were sent to prison. Hear archive recordings of the men who stood against the war. Photo: A crowd of conscientious objectors to military service during World War I at a special prison camp.(Hulton Archive)

In July 1976, women were admitted to the prestigious West Point military academy in the United States for the first time. Simon Watts talks to Marene Nyberg, one of the first female intake.PHOTO: Women cadets at West Point in 1976 (Getty Images)