Witness History

In September 2008, the world's biggest science experiment, the Large Hadron Collider, was started up for the first time at the European Organisation For Nuclear Research, or CERN, in Geneva. Simon Watts talks to Paul Collier, a British engineer whose team built the multi-billion dollar machine designed to investigate the structure of the universe.PHOTO: Inside the Large Hadron Collider (Getty Images)

When the Islamic State group took over Mosul in Iraq in 2014 they flooded the internet with propaganda, claiming life under IS was fantastic. One historian living in the city decided to post a counter-narrative online. Omar Mohammed set up "Mosul Eye" to expose the atrocities and failings of IS fighters, but it was at great risk to his own safety. Omar tells Rebecca Kesby how he posted news from Mosul to the outside world from right under the noses of the Islamic State group. He says he felt it was his duty to tell the real story.(Photo: Mosul Eye website. BBC)

Theodor Wonja Michael was a child when Hitler came to power in Germany. The son of a German mother and a Cameroonian father he faced discrimination and danger under Nazi rule. He has been speaking to Caroline Wyatt about how working as a film actor helped him to survive World War Two.Photo: Theodor Wonja Michael at the Frankfurt Book Fair in 2013. Credit: Alamy

The Rodgers and Hammerstein musical was first performed on stage in New York in 1959, several years before it was made into a film. Vincent Dowd has been speaking to two people with connections to the original Broadway production. Tim Crouse is the son of Russel Crouse who wrote the book for "The Sound of Music". Lauri Peters played the eldest daughter of the von Trapp family on stage. Photo: The original Broadway cast of "The Sound of Music" in 1959. Lauri Peters is at the top of the stairs. Credit: Bettmann/Getty Images

Sir Anthony Blunt, a distinguished British art historian and curator of the Queen's pictures was exposed as a former Soviet spy in the autumn of 1979. He was stripped of his knighthood and publicly shamed as a traitor for being part of the Cambridge spy ring. Susan Hulme has been speaking to Christopher Morris who was the BBC reporter sent to interview Blunt when the story broke.Photo: Sir Anthony Blunt at the press conference in which he explained his motivation in 1979 (Credit: Aubrey Hart/Getty Images)

The first book in the Chronicles of Narnia series by the Northern Irish-born writer CS Lewis was published in autumn 1950. The Lion, the Witch and the Wardrobe would go on to become one of the great classics of children's literature. CS Lewis's stepson, Douglas Gresham, talks to Louise Hidalgo about the academic and theologian who created Narnia's magical world.Picture: CS Lewis, the children's and theological author, seated in his Cambridge study in the early 1950s (Credit: Camera Press/Arthur Strong)

The Black Panther Party hit the headlines in the late 1960s with their call for revolution. But they also ran a number of "survival programmes" to help their local communities - the biggest of which was a project providing free breakfasts for schoolchildren.Reverend Earl Neil was one of the organisers of the first Free Breakfast for Children programme at St Augustine's Church in Oakland, California. He speaks to Lucy Burns.(IMAGE: Shutterstock)

LGBT servicemen and women in the US armed forces had to keep their sexuality secret until the 'Don't ask, don't tell' policy was repealed in 2011. Lieutenant Colonel Heather Mack served under the policy for most of her military career. She has been speaking to Rachael Gillman about her experiences.Photo: Lieutenant Colonel Heather Mack (l) with her wife Ashley (r) and their two children. Courtesy of Heather Mack

In the early 1950s the Ethiopian Emperor, Haile Selassie, sent thousands of Ethiopian troops to fight in the Korean war. They were called the Kagnew Battalions and they formed part of the American-led UN force supporting South Korea against communist North Korea and their Chinese allies. Alex Last spoke to Captain Mamo Habtewold who won his country's highest honour. This programme is a rebroadcast.Photo: The Captain as a young man. Courtesy of Mamo Habtewold.

In September 1519, a fleet led by the Portuguese explorer Ferdinand Magellan set off on what would be the first circumnavigation of the world. Magellan was the first navigator to find a route round South America, but he had to quell several attempted mutinies and he was eventually killed by tribesmen in what is now the Philippines. His circumnavigation was completed in 1522 by one of his subordinates, Juan Sebastian Elcano. Simon Watts tells Magellan’s story through the book published by his on-board chronicler, Antonio Pigafetta.PHOTO: Magellan's fleet (Hulton Archive/Getty Images)

How the timber industry fuelled a brutal civil war in West Africa. In the late 1990s, timber companies worked closely with Liberia's warlord-turned-president, Charles Taylor. In return for money and support for his militias, the regime allocated huge swathes of the country's valuable rainforest to timber companies for logging. A group of young Liberians started to document what was happening. Alex Last has been speaking to the award winning activist, Silas Siakor, whose work led to a UN ban on Liberian timber exports.(Photo: Timber near Buchanan in LIberia in 2010. Credit: Getty Images)

In 1990 the Indian government introduced an affirmative action plan that had been lying unimplemented for a decade. The Mandal Commission recommended guaranteeing a percentage of government jobs to lower caste Hindus. It's implementation was an attempt by the government to quell the rise of Hindu nationalism. But the move proved controversial from the outset and led to weeks of student protests across India. Farhana Haider has been speaking to a retired superintendent of police, Dilip Trivedi who remembers the implementation of the report and its aftermath.Photo Students protesting Mandal Commission proposal for quotas on govt. jobs for so called backward castes 1990. Credit Getty Images.

A new show called Friends hit American TV screens in September 1994. It was based on the lives of six young New Yorkers and became one of the most successful comedies of all time. It sold around the world. Farhana Haider spoke to one of the show's creators, Kevin Bright.Photo: The cast of Friends in 1994. Copyright: Warner Bros. Entertainment, Inc.

In September 2009 the deposed president of Honduras, Manuel Zelaya, made a sudden return from exile, seeking refuge in the Brazilian embassy in the Honduran capital. Zelaya had been whisked out of the country at gunpoint after a military coup three months earlier. His unexpected return took the coup leaders totally by surprise. Mike Lanchin has been hearing from two men who spent several months holed up inside the embassy building alongside the Honduran leader. Photo: Manuel Zelaya with supporters inside Brazil's embassy (Credit should read ORLANDO SIERRA/AFP/Getty Images)

In 1991, Palermo businessman Libero Grassi published an open letter in Sicily’s main newspaper denouncing the Mafia for constantly demanding extortion payments. Grassi was hailed as a hero, but his public refusal to pay was intolerable to the Mafia and a few months later he was executed in person by one of Cosa Nostra’s top bosses. Libero Grassi’s defiance is credited with inspiring a new grass-roots movement among businesses in Sicily that stands up to the Mafia. Simon Watts talks to his daughter, Alice Grassi.PHOTO TO COME

The controversial historian, David Irving, tried to sue Penguin Books and professor Deborah Lipstadt for libel after she called him a Holocaust denier in one of her books. The case drew intense media interest. Deborah Lipstadt told Rebecca Kesby what it was like to have to defend her work and the memories of survivors of the Holocaust at the High Court in London in 2000. History was on trial.(Photo: American academic Deborah Lipstadt (C) exults 11 April 2000 at the High Court in London after winning a libel case brought against her and Penguin publications by British revisionist historian David Irving. Credit: Martyn Hayhow/AFP/Getty Images)

When the crew of Apollo 11 returned to earth after their historic mission to the Moon, they were immediately placed in quarantine for 3 weeks. It was done to protect the Earth from the dangers of possible lunar alien life. Dr William Carpentier was the flight surgeon for the Apollo 11 mission and was placed in quarantine with the crew to monitor their health and check for any signs of alien life. He talks to Alex Last about his memories of working with the Apollo programme and life in quarantine.Photo: Apollo 11 astronauts (left to right): Neil Armstrong, Michael Collins and Buzz Aldrin peer from window of the Mobile Quarantine Facility aboard the U.S.S. Hornet after their July 24th recovery.

The UN deployed its first all-female contingent of peacekeepers in Liberia in West Africa. The country was still recovering from its long civil war when the Indian policewomen arrived in 2007. Jill McGivering has been hearing from Seema Dhundia of India's Central Reserve Police Force who led the unit.Image: Seema Dhundia in front of her contingent of Indian policewomen on their arrival in Monrovia, Liberia, in January 2007. (Credit:Issouf Sanogo/AFP/Getty Images)

On September 1st 1939 German forces invaded Poland. Douglas Slocombe, a British cameraman, was there at the time and filmed the build-up to the war. In 2014 he spoke to Vincent Dowd about what he saw in Gdansk and Warsaw, before escaping from the country.This programme is a rebroadcast(Image: German citizens in Gdansk (also known as Danzig) welcoming German troops during the invasion of Poland on September 3rd 1939 . Credit:EPA/National Digital Archive Poland.)

In 2009 a paedophile was convicted with the help of a new form of identification - hand analysis. Dame Sue Black of Lancaster University explains how her team developed this tool and how criminal courts in Britain first responded to the evidence. She says vein patterns as well as scars and skin creases suggest hands may eventually be found to be as identifiable as fingerprints. Photo: Courtesy of Lancaster University

The great African-American jazz singer Nina Simone moved to the Liberian capital Monrovia in September 1974. Simone was famous for her vocal support for the civil rights movement in the USA as well as for songs like I'm Feeling Good, Mississippi Goddam and I Wish I Knew How It Would Feel To Be Free, and she was invited to the West African republic by her friend the singer Miriam Makeba.Lucy Burns speaks to Nina Simone's friend James C Dennis Sr.Picture: Nina Simone performs on stage at Newport Jazz Festival on July 4th 1968 in Newport, Rhode Island (David Redfern/Redferns)

In the months leading up to outbreak of World War Two in September 1939, some 10,000 unaccompanied children were sent by their parents out of Germany and Austria, to safety in the UK. Many of them never saw their families again. Dame Stephanie Shirley was just five years old when she and her older sister were put on a train by their mother in Vienna. She has been telling Mike Lanchin about arriving in a foreign land as a little girl.Photo:Getty Images

In 1993 young women began disappearing in the Mexican border town of Ciudad Juarez. Since then hundreds are reported to have been kidnapped and killed. Mike Lanchin has spoken to a forensic scientist who used to work in the city; and to the mother of one of the murdered girls. This programme was first broadcast in 2013.Photo: Jorge Uzon. AFP/Getty Images

Emmett Till, a black teenager from Chicago, was brutally murdered in Mississippi, in the USA.His death was one of the key events that energized the American civil rights movement. An all-white jury acquitted the two white suspects. Farhana Haider has been listening through interviews with some of Emmett's family, to tell the story of the young boy who became an icon in the struggle against racism in America.(Photo: Emmett Till lying on his bed in Chicago, in 1955. Credit: Getty Images)

In August 1954 the President of Brazil took his own life rather than quit his post. Getulio Vargas had been one of Brazil’s most influential leaders. But by 1954 the country was saddled with hundreds of millions of dollars of overseas debt and inflation was high. Worse, Vargas had been accused of involvement in the attempted assassination of a political opponent. Julian Bedford spoke to his granddaughter Celina Vargas do Amaral Peixoto. This programme was first broadcast in 2012.Photo: Getulio Vargas, 1930 (Getty Images)

Wolves were reintroduced into Yellowstone National Park in 1995. It was the start of one of the most famous and controversial wildlife restoration projects in the United States. Beginning in the late 19th century wolves had been subjected to a mass extermination programme as ranchers feared the wolf was a threat to their livestock. By the mid 20th century, wolves had effectively been wiped out across the country except for a few isolated pockets in the far north. But the loss of this key predator had a profound impact on the ecosystem. Alex Last has been speaking to Doug Smith, Senior Biologist at Yellowstone National Park, and Wolf Project Leader about the return of the wolf. Photo:.A Yellowstone wolf watches biologists after being tranquilized and fitted with a radio collar during wolf collaring operations in Yellowstone National Park (William Campbell/Sygma via Getty Images)

On August 25 1944 General Charles De Gaulle, who had been in exile in London for the majority of World War 2, finally entered Paris at the head of the Free French forces. But the French capital was far from secure. Ashley Byrne hears from Charles Pegulu de Rovin, who as an 18-year-old student fought with other resistance fighters against the Nazis in the final battle for Paris.(Photo by Pierre Jahan/Roger Viollet via Getty Images)

At the end of El Salvador's civil war human rights investigators began the search for hundreds of children reportedly kidnapped by the army during anti-guerrilla operations. In early 1994, two years after the end of the conflict, the first six children were located in an orphanage in the capital San Salvador. Among them was Maria Elsy Dubon, who had been seized by soldiers who killed her father in May 1982. Mike Lanchin has been hearing about Maria Elsy's distressing ordeal and about the difficult reunion she later had with her biological family, who believed that she was dead.(Photo: Peasants who lost their children during military operations in the civil war at a rally in March 2006 (YURI CORTEZ/AFP/Getty Images)

In 1998, a transponder or silicon chip was surgically implanted into the forearm of a British scientist. It sent identifying signals to a central computer that tracked his movements and allowed him access to his workplace, by opening doors and switching on lights. Professor Kevin Warwick has been speaking to Farhana Haider about becoming a more enhanced version of himself and as a result the world's first Cyborg: a man-machine hybrid.Photo: Professor Kevin Warwick with chip transponder Credit: Science Photo Library

The Dr Seuss books revolutionised the way American children learnt to read in the 1950s. Books like 'The Cat in the Hat' were designed to help young children enjoy reading simple words and sentences using rhymes, anarchic characters and lively illustrations. Claire Bowes spoke to Christopher Cerf who knew Theodor Geisel, the author of the books. Photo: Author and illustrator Ted Geisel sits at his drafting table with a copy of his book, 'The Cat in the Hat' in 1957. (Gene Lester/Getty Images)

In the 1980s Ilich Ramírez Sánchez known as 'Carlos the Jackal' was seen as the world's most-wanted terrorist. He had carried out bombings, killings and kidnappings and had been on the run for decades. He was finally arrested in Khartoum in August 1994. Alex Last spoke to former CIA operative, Billy Waugh, who tracked him down.Photograph: Rare photo of Carlos the Jackal, taken in the 1970s (AFP/Getty Images)

Throughout 2001 the US authorities were being given warnings that a terror attack was imminent. A Congressional Commission, FBI officers and the CIA were all worried. There were even specific warnings about planes being flown into buildings. Louise Hidalgo has been speaking to former Senator Gary Hart who co-chaired the Congressional Commission that tried to convince the government to take action.Photo: Smoke pours from the World Trade Centre after it was hit by two passenger planes on September 11, 2001 in New York City. (Credit: Robert Giroux/Getty Images)

The contact lens was once a precious and expensive piece of eyewear which had to be looked after and carefully cleaned every night. But that all changed in the 1990s. Ron Hamilton was involved in developing lenses and packaging which could be made so cheaply they could be worn just once and then thrown away. He has been speaking to Ashley Byrne.Photo: Ron Hamilton (l) with his business partner Bill Seden (r) and their wives with their original contact lens machine. Courtesy of Ron Hamilton.

In October 1947, an invasion of Kashmir by tribal fighters led to the division of the state between India and Pakistan. Andrew Whitehead speaks to victims of the invasion and political leaders in Kashmir to find out more about the roots of a crisis that endures to this day.PHOTO: Indian troops arriving in Kashmir in October 1947 (Getty Images)

In 1949 a British warship, HMS Amethyst, launched a daring escape after it was held captive for months by Chinese Communists on the Yangtze river. The ship had been badly damaged when it was fired on by Communist forces as it sailed up the river to help evacuate British citizens from Nanking during the final months of China's civil war. Using eyewitness accounts in the BBC Archive, we tell the story of HMS Amethyst.Photo: The HMS Amethyst (F116) arrives in Hong Kong after it's epic escape down the Yangtse. (Photo Hulton-Deutsch Collection/CORBIS/Corbis via Getty Images)

In August 1969 the British Army was first deployed in Northern Ireland. Their job was to keep the peace on the streets of Londonderry where sectarian violence had broken out. To begin with the soldiers were welcomed by residents, but attitudes soon changed and what became known as 'The Troubles' got underway.Picture: Armed British soldiers on the streets of Northern Ireland, 15th August 1969 (Credit: Press Association)

In the 1970s the UK tried to reduce its growing prison population. An experimental new punishment was introduced for convicted criminals. It was called Community Service. The scheme was soon copied around the world. Witness History speaks to John Harding, a former Chief Probation Officer, who was in charge of the introduction of Community Service in one of the first pilot schemes.Photo: BBC

In 1958 the nuclear submarine USS Nautilus travelled under the North Pole. Julian Bedford spoke to retired vice Admiral Kenneth Carr in 2012 about the mission spurred by the Cold War battle for technological supremacy.Photo: The USS Nautilus arriving in the UK. Copyright: BBC

Hundreds of thousands of French people who'd been living in Algeria for generations fled for safety to France in the summer of 1962. It was in the last days of the war of independence in the North African nation. Known as the 'Pieds Noirs', the new arrivals were not generally well-received back in France. Mike Lanchin has been speaking to Michelle Hensel, who left Algeria for France as a small child.Photo: French repatriates leaving Algeria May 1962. (Photo by REPORTERS ASSOCIES/Gamma-Rapho via Getty Images)

Thousands of Iraqi troops and tanks began pouring into Kuwait on 2 August 1990. The tiny, oil-rich Gulf state was immediately taken over by Saddam Hussein's military. Sumaya Bakhsh has spoken to Sami al-Alawi who joined the Kuwaiti underground resistance trying to free the country.Photo: Soldiers shelter behind a tank during the Iraqi invasion of Kuwait on August 2nd 1990. Credit: REUTERS.

On 1 August 1944, resistance fighters in the Polish capital rose up against German occupying forces. The uprising lasted for 63 days and some 200,000 people were killed, Warsaw itself was largely destroyed. Zbigniew Pelczynski was one of the young Poles fighting to free Warsaw from the Nazis, in 2014 he spoke to Louise Hidalgo about the battle.(Photo: Zbigniew Pelczynski in 1946)

In 1980 the Bavarian government announced plans to build a nuclear reprocessing plant in Wackersdorf in southern Germany. Eight years later construction on the plant was halted after a sustained protest campaign which saw tens of thousands of demonstrators and sometimes violent clashes with the police.Lucy Burns speaks to local district administrator Hans Schuierer, who became a figurehead for the protests.Picture: demonstrators fight against police during a protest at the Wackersdorf construction site (Istvan Bajzat/DPA/PA Images)

One of the most remarkable archaeological discoveries in British history was made in the summer of 1939, when a huge hoard of Anglo-Saxon gold was found at Sutton Hoo in Suffolk. Lucy Burns presents material from the BBC archives.Picture: the Sutton Hoo Helmet on display at the British Museum on March 25, 2014 in London, England (Oli Scarff/Getty Images)

How the death of a UK weapons inspector intensified arguments over Britain's involvement in the invasion of Iraq in 2003. Rebecca Kesby has been speaking to one of the doctors who signed a letter calling for further investigation of the circumstances surrounding Dr Kelly's death.Photo: Dr David Kelly during questioning by the Commons select committee, in London in July 2003. Credit: Press Association.

In July 2001 a team of palaeontologists led by Michel Brunet discovered a seven million year-old fossilised skull in the Djurab desert in Chad. Ahounta Djimdoumalbaye was the member of the team who first uncovered the skull which has been nicknamed Toumai. Freddy Chick has been speaking to Professor Brunet about his hunt for hominid fossils in West Africa. Photo: French palaeontologist Professor Michel Brunet, holding Toumai's skull along with Ahounta Djimdoumalbaye who discovered the skull. (Photo credit Patrick ROBERT/Corbis via Getty Images)

When Tunisia achieved independence it brought in a new equality law that revolutionised women's lives. In August 1956 under the socialist President Habib Bourguiba, the north African country became the first in the muslim world to legalise civil divorce and abortion and to ban polygamy. He also gave women the vote and widened access to education. Nidale Abou Mrad spoke to Saida El Gueyed a founding member of the Tunisian Women's Union who was asked by President Bourguiba to help both men and women understand how the new law would change their lives.Photo: Courtesy of Saida El Gueyed

In July 1969, United States Senator Edward Kennedy was involved in a car accident on Chappaquiddick Island in which a young woman named Mary Jo Kopechne died. Around 10 hours elapsed before the politician reported the incident to police. In 2014 Paul Schuster spoke to retired police chief Jim Arena who investigated the accident.(Photo: US Senator Edward Kennedy. Credit: AFP/Getty Images)

LGBT people in China sometimes arrange fake marriages to hide their sexuality. In 2005 Lin Hai set up a website to allow lesbians and gay men to get in touch with each other. He came up with the idea to stop his family from putting pressure on him to get married. Homosexuality is not illegal in China but there is discrimination against LGBT people. (Photo: Lin Hai and his partner on holiday in Thailand in 2014. Credit: Lin Hai)

The hit musical Mamma Mia! opened in London's West End in 1999. Using the songs of the Swedish pop group ABBA, the stage show was followed in July 2008 by Mamma Mia! the movie and ten years later by a sequel, both of which have broken musical box-office records. Louise Hidalgo has been talking to Mamma Mia's creator Judy Craymer about how it all began.Picture: Mamma Mia! the musical West End promotional poster (Credit: Littlestar Services)

On Christmas Day 2003, a British spacecraft was due to land on Mars and begin searching for signs of life. The late Professor Colin Pillinger was the man behind the mission, his daughter Shusanah spoke to Rob Walker about Beagle 2 in 2015. This programme is a rebroadcast.Photo:Lead scientist Colin Pillinger poses with a model of Beagle 2 in November 2003. (Credit: Scott Barbour/Getty Images)