Witness History: Witness Archive 2016

In 1999 the body of the legendary British mountaineer, George Mallory, was found on Mount Everest. Mallory disappeared on the mountain in 1924 after making a final push for the summit with his fellow climber Andrew Irvine. They were never seen again. Farhana Haider has been speaking to Jochen Hemmleb one of the original members of the team that discovered George Mallory's remains.Photo: George Mallory. Credit: Getty

In November 1994, the Russian conceptual artist Oleg Kulik posed in front of an art gallery in central Moscow, naked, pretending to be a guard dog and attacking passers by. It was his way of highlighting the fact since the collapse of the USSR three years earlier, Russians had lost their ability to relate to each other, and were reduced to living like animals. Dina Newman speaks to Kulik about his protest performance, which made him famous around the world.Photo: Oleg Kulik impersonating a Mad Dog, 25th Nov 1994, Moscow. Credit: private archive

One of the most potentially dangerous legacies of the collapse of the Soviet Union was its huge nuclear arsenal and nuclear weapons industry. There were particular concerns about the Soviets' former nuclear testing site at Semipalatinsk in Kazakhstan, a vast swathe of contaminated land where there were tunnels with spent plutonium. When the Soviet Union ended, the site was left open to scavengers. Louise Hidalgo has been hearing from the former head of America's nuclear weapons laboratory, Dr Siegfried Hecker, about the long secret operation by Russian and American scientists to make the site safe in what's been called the greatest nuclear non-proliferation story never told.Photo: the first historic visit by American nuclear scientists to the secret Soviet city of Sarov where Moscow developed nuclear weapons, February 1992. First on the left is the great Russian physicist, Alexander Pavlovsky. Next, looking down, is Yuli Khariton, the father of the Soviet atomic bomb. Opposite, with a white turtle-neck jumper, is Dr Siegfreid Hecker, then director of Los Alamos Laboratory where America developed the world's first nuclear bomb (Credit: Dr Siegfreid Hecker)

In December 1991 the leaders of three Soviet Republics - Russia, Ukraine and Belorussia - signed a treaty dissolving the USSR. They did it without asking the other republics, and against the wishes of the USSR's overall President Mikhail Gorbachev. By the end of the year Gorbachev had resigned and the Soviet Union was no more. Dina Newman has spoken to the former President of Belorussia, Stanislav Shushkevich, and the former President of Ukraine, Leonid Kravchuk, who signed that historic document alongside Boris Yeltsin.Photo: the leader of Ukraine, Leonid Kravchuk, the leader of Belorussia, Stanislav Shushkevich and the leader of Russia, Boris Yeltsin at the signing ceremony. Credit: AP

On December 22nd 1989, the great Irish playwright and novelist Samuel Beckett died. Beckett, whose play Waiting for Godot had revolutionised post-war theatre, was one of the most influential writers of the 20th century. Louise Hidalgo has been talking to fellow playwright and film director Israel Horovitz who was Samuel Beckett's friend.Photograph: Writer Samuel Beckett (1906-1989) (Credit: Reg Lancaster/Getty Images)

The experimental film-maker made his first full-length film in 1976, it was called Sebastiane - and it was in Latin. It was the first openly gay feature film in British cinema. Vincent Dowd has been speaking to Keith Collins who lived with him during his final years, and cared for him when he was dying of AIDS.Photo: Derek Jarman in 1991. Credit: BBC

Vida Alves starred in Latin America's first soap opera, or telenovela. 'Sua Vida Me Pertence' was broadcast in Brazil in December 1951. It kick-started a TV genre that has spread across the globe and is now worth hundreds of millions of dollars. Vida speaks to Mike Lanchin about her memories of making TV history.Photo: Vida Alves and Walter Forster in a scene from 'Sua Vida Me Pertence', Brazil 1951 (Museu Pró-TV)

In September 1995, millions of Hindus around the world were gripped by reports of their God, Ganesha, 'drinking' milk. Rachael Gillman hears from Hindu priest Radha Krishna Bharadwaj about first seeing the apparent 'miracle' at the Shree Durga Vishno temple in New Delhi.Photo Credit: MUFTY MUNIR/AFP/Getty Images

In the 1970s, Maria Dolores Gonzalez Katarain, known as Yoyes, became the first woman to reach the leadership of the Basque separatist group, ETA, who were fighting a violent campaign for independence from Spain. Yoyes eventually decided to leave and start a new life, but she was considered a traitor. In September 1986, ETA killed her in a crime that shocked even its own supporters. Simon Watts speaks to Yoyes' friend, Elixabete Garmendia.

In 2005 British scientist Elizabeth Fisher and a colleague successfully transplanted a human chromosome into a mouse for the first time. It transformed medical research into the genetic condition Down Syndrome that affects millions of people worldwide. Professor Fisher tells Louise Hidalgo about the challenges researchers faced and their thirteen-year struggle to create the first Down Syndrome mouse.Photo: Science Photo Library

Yelena Malyutina was a Soviet female bomber pilot who fought in WW2 and was wounded in action in 1944. She was in one of the three Soviet women's flying regiments which fought on the front line. Before her death in 2014, she was interviewed by Lyuba Vinogradova, author of 'Defending the Motherland: Soviet Women' who fought Hitler's Aces. Dina Newman reports. Photo:Yelena Malyutina and Lyuba Vinogradova (credit: private archive)

In the early 1980s Mercedes Doretti, a student of anthropology in Buenos Aires, began helping in the search for some of the victims of Argentina's military rule. She went on to form the prestigious Argentine Forensic Anthropology Team, which has carried out exhumations in more than 30 countries. Her work gathering evidence of some of the worst atrocities of our times, has taken her to Bosnia, South Africa, El Salvador and Mexico. Mercedes spoke to Mike Lanchin about the challenges of her harrowing task and about a life-time dedicated to the cause of truth and justice. Photo: Mercedes Doretti excavates a skull from what used to be the convent of the church at El Mozote, El Salvador, Oct. 1992. (AP Photo/Luis Romero)

After India's traumatic Partition Prime Minister Jawaharlal Nehru persuaded the maverick Swiss-French architect, Le Corbusier, to help reinvent a newly independent India by building a new capital city for the province of Punjab.Le Corbusier had revolutionised architecture and urban planning in the first half of the twentieth century. He was loved and hated in equal measure for his modernist approach, favouring flat roofs, glass walls and concrete.Nehru said this new city would be "symbolic of the freedom of India, unfettered by the traditions of the past". Starting in 1950 the city of Chandigarh was built from scratch on farmland and is unlike any other city in India. The broad boulevards, pedestrianised plazas and green spaces were designed to encourage a feeling of order and of being close to nature.Claire Bowes spoke to Sumit Kaur, former Chief Architect and lifelong resident of Chandigarh, about the personal legacy left by Le Corbusier.Photo:The Chandigarh Legislative Assembly building. 1999 (AFP PHOTO / John Macdougall)