Witness

In July l945 Britain's great wartime leader, Winston Churchill, was defeated in a general election. The Labour party's landslide came just weeks after the surrender of Nazi Germany and remains one of the greatest shocks in British political history. How did Winston Churchill, a hugely popular national hero, fail to win? Louise Hidalgo has been listening back through the archives.Picture: Winston Churchill makes a speech during the 1945 election campaign (Credit: Hulton Archive/Getty Images)

When colonial explorers discovered an ancient ruined city in Zimbabwe, they claimed foreigners must have built it. They denied the probability that it was the work of a great African civilisation that dominated southern and east Africa with its trade in gold. After independence Zimbabwe was able to reclaim its full heritage. Rebecca Kesby spoke to Dr Ken Mufuka - the historian who was tasked with rewriting the history books. (Photo; The iconic tower in the Great Enclosure of the Great Zimbabwe National Monument. It's one of the most important archaeological sites in Africa and is a UNESCO World Heritage Site. Credit; Getty Creative.)

US Vice President Richard Nixon and Soviet leader Nikita Khrushchev had an argument about living standards when Nixon visited Moscow in 1959. They spoke at an exhibition of a 'typical' American house full of modern domestic appliances.Photo: The two leaders surrounded by press at the exhibition in Moscow, 1959. (Photo credit: Universal History Archive/UIG via Getty Images)

At the start of the Korean war in 1950, tens of thousands of suspected communist sympathisers were executed by the South Korean military. The regime feared they might support the North Korean invaders. Many of them were political prisoners, who were taken from their cells and shot dead. Mike Lanchin has been hearing from Gaeseong Lee, whose father was a prisoner at Daejeon jail when he was killed.Photo:Gaeseong Lee as a small child with his parents. Copyright: Gaeseong Lee.

Two IRA bombs were detonated in Hyde Park and Regent's Park in London on 20th July 1982. They left 11 military personnel dead, and injured around 50 people. Seven horses were also killed as the Hyde Park bomb was detonated during the Changing of the Guard procession. Karen Gregor has been speaking to former Army vet, Paddy Davison, who was called to the scene.Photo: The covered bodies of horses lying in the road after the Hyde Park bombing. Credit: BBC

In July 1968 one of the most significant international treaties of the 20th-century was signed. The Nuclear Non-Proliferation Treaty was aimed at stopping the spread of nuclear weapons, obliging signatories not to pass nuclear technology on to others, and was the result of rare cooperation between Cold War adversaries, the United States and the Soviet Union. Louise Hidalgo talks to former Soviet diplomat, Roland Timerbaev, who helped draft the treaty.Picture: the mushroom cloud created by the explosion of an atomic bomb on the Japanese city of Hiroshima on 6th August 1945 (credit: Press Association)

On July 22 1946 an armed Jewish group opposed to British rule in Palestine, attacked the iconic hotel in Jerusalem where the British had their headquarters. 91 people were killed in the bombing, dozens of others were injured. Shoshana Levy Kampos was a 21-year-old Jewish woman who worked for the British as a secretary. She tells Mike Lanchin about her lucky escape. Photo: Scene of wrecked King David Hotel in Jerusalem after bombing (Photo by Fox Photos/Getty Images)

To fight food shortages in the 1950s the USSR embarked on a major agricultural project to develop vast areas of previously uncultivated land in northern Kazakhstan. The project attracted hundreds of thousands of enthusiastic volunteers, but decades later it led to environmental problems. Dina Newman spoke to an agricultural volunteer, Rimma Busurova. Photo: Rimma Busurova and her classmates outside their dormitory in northern Kazakhstan; credit: Rimma Busurova family archive.

The Russian Tsar Nicholas II and his wife, four daughters and young son, were shot in the cellar of a house in Yekaterinburg on 17 July 1918. Olga Romanoff is his great niece. She spoke to Olga Smirnova about his death and eventual reburial in St Petersburg. (Photo: Nicholas II, Tsar and his family. From left to right - Olga, Maria,Tsar Nicholas II,Tsarina Alexandra, Anastasia, Tsarevitch Alexei and Tatiana. Credit: Press Association

In the summer of 2001, an Italian journalist used an underwater robot to find the remains of a shipwreck off the coast of Sicily which had killed nearly 300 migrants from South Asia. At the time this was the worst disaster of its kind in the Mediterranean but the few survivors had been ignored by officials and dismissed as fantasists. The discovery of the so-called “Phantom Shipwreck” caused an outrage in Italy. Simon Watts talks to Italian journalist Giovanni Maria Bellu and the former Observer correspondent in Rome, John Hooper, who also investigated the tragedy.(Photo: The remains of the "Ghost Shipwreck" filmed off the Sicilian coast. Credti: EPA/ANSA/La Repubblica)

In the early 1960s a magazine article about West Germany's defence capabilities led to the imprisonment of seven journalists, a vehement debate about press freedom and a full-blown government crisis. Tim Mansel has been speaking to Franziska Augstein about her father Rudolf Augstein's part in the Spiegel Affair.Photo: Rudolf Augstein, the publisher of the magazine 'Spiegel' is escorted by the police. Credit: Keystone/Getty Images

The inside story of how India secretly developed and exploded an atomic device in 1974. India called it a Peaceful Nuclear Explosion, though the experimental device was in effect a plutonium bomb. The test was seen as a triumph of Indian science and technology, but it led to the suspension of international nuclear co-operation with India, and spurred Pakistan to speed up development of its own nuclear bomb. Alex Last spoke to S.K Sikka, one of India's leading nuclear scientists, about his role in the secret project, code-named Smiling Buddha.Photo: A crater marks the site of the first Indian underground nuclear test conducted 18 May 1974 at Pokhran in the desert state of Rajasthan. (PUNJAB PHOTO/AFP/Getty Images)

In 1958 Nigerian writer, Chinua Achebe, published his first book "Things Fall Apart". It was set in pre-colonial rural Nigeria and examines how the arrival of foreigners led to tensions within traditional Igbo society. The book revolutionised African writing, and began a whole new genre of world literature. In 2016 Rebecca Kesby spoke to Achebe's youngest daughter, Nwando Achebe.(Photo: Chinua Achebe in 2002. Photo Credit: Reuters/Ralph Orlowski/Files )

When war broke out in Kosovo in 1998, Nato intervened with air-strikes. US Secretary of State Madeleine Albright was the main proponent for military action. She explains to Rebecca Kesby why she argued for action, and tells her own remarkable story, from a childhood in Czechoslovakia to the highest political office ever held by a woman in the United States at the time. (Photo: Madeleine Albright. Credit US Government)

Post-war Britain saw a rise in makeshift adventure playgrounds born out of bomb sites. Children were provided with tools and raw materials, to build whatever they wanted to play with, using their own imagination. Anya Dorodeyko spoke to Tony Chilton, an early "playworker" and champion of adventure playgrounds in the UK about their boom in the 1970s.Picture: children playing on an adventure playground in London in the 1970s (Credit: BBC)

A controversial installation by Russian conceptual artists Ilya and Emilia Kabakov offended Russians in 1992, but is now seen as a masterpiece. Emilia Kabakov told Dina Newman that The Toilet is "a metaphor for life." Photo: The Toilet, a model; credit: Kabakov archive

On 3 July 1988, a US Navy warship, the USS Vincennes, shot down an Iranian civilian airliner over the Persian Gulf. All 290 on board the aircraft were killed, among them 66 children. The plane was flying a scheduled service from Bandar Abbas in Iran to Dubai but was mistakenly identified as "hostile" by the US ship. Alex Last has been hearing a rare first-hand account from Rudy Pahoyo, a former US Navy Combat Cameraman who happened to be filming on the USS Vincennes that day. Photo: The USS Vincennes fires a surface to air missile towards Iran Air flight 655 on 3 July 1988 (Rudy Pahoyo)

In July 2005, the identity of one of the most famous informants in American political history was revealed. Deep Throat leaked details of President Nixon's Watergate cover-up to the Washington Post leading eventually to the president's resignation. He was former assistant director at the FBI, Mark Felt. Louise Hidalgo has been talking to the lawyer who helped persuade the elderly Mark Felt to go public after 30 years of silence and speculation.Picture: Bob Woodward (left) and Carl Bernstein, the Washington Post reporters who broke the Watergate story, at their desk, 29th April 1973. They nicknamed their anonymous source Deep Throat. (Credit: Getty Images)

Former President George Bush Senior gave up his lifetime membership of the country's most powerful gun-lobby, the NRA, in 1995. Claire Bowes has been speaking to his speechwriter, Jim McGrath, to find out why the 41st President turned his back on the National Rifle Association, a body so closely associated with political power.Photo: Portrait Of President George Herbert Walker Bush in 1991 (credit: Bachrach/Getty Images)

In 1981 a Whiskey-class Soviet submarine became stranded on a rock just off the coast of southern Sweden. For years Sweden had suspected the Soviets of patrolling illegally in their territorial waters. Now they had their proof. It took 11 days of tense negotiation before the submarine was allowed to leave. Tim Mansel speaks to Klas Helmerson, who helped interpret on behalf of the Swedish navy.Photo: The Soviet submarine U-137 that ran aground in Karlskrona archipelago, Sweden in October 1981 (Credit: TT agency via Press Association)