On 27 January 1945, prisoners at the Nazis’ largest death camp were freed by the Soviet Union’s Red Army.

General Vasily Petrenko commanded one of the four units that liberated Auschwitz.

The Nazis murdered 1.1 million people at Auschwitz-Birkenau between 1941 and 1945. Almost a million were Jews, 70,000 were Polish prisoners, 21,000 Roma, 15,000 Soviet prisoners of war and an unknown number of gay men.

It was one of six death camps the Nazis built in occupied Poland in 1942, and it was by far the biggest.

Vicky Farncombe produced this episode using an interview General Vasily Petrenko gave to the BBC’s Russian Service in 2001. He died in 2003.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

(Photo: Auschwitz survivors watch the arrival of Soviet troops come to free them. Credit: Keystone-France/Gamma-Keystone via Getty Images)

On 26 January 1926, John Logie Baird first demonstrated his 'televisor' in public. It was the prototype for television.

Many people couldn't believe what they were seeing whilst others thought it was a pointless invention.

In 2010, Iain Logie Baird, the inventor's grandson, spoke to Claire Bowes.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

(Photo: Inventor John Logie Baird. Credit: Topical PressAgency/Getty Images)

On 12 January 1976, author Agatha Christie died peacefully, aged 85.

She created the detectives Hercule Poirot and Miss Marple.

By the time of her death, Christie had written more than 80 books. Most of her works were detective novels but she also wrote romances, short stories, poetry and plays.

In 2015, Louise Hidalgo spoke to her grandson, Mathew Prichard.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

(Photo: English detective novelist, Agatha Christie. Credit: Bettman/Getty Images)

On 28 January 1986, a space shuttle launch went wrong.

Six astronauts and a teacher, Christa McAuliffe, were killed.

In 1984, US President Ronald Reagan had announced that Nasa would search for a member of the public to accompany experienced astronauts on the space shuttle Challenger.

Barbara Morgan was chosen as the teacher backup and had trained alongside the Challenger team.

She watched as the shuttle was destroyed a little more than a minute after take-off.

In 2012, Barbara Morgan spoke to Chloe Hadjimatheou.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

(Photo: Launch of Space Shuttle Challenger. Credit: Oxford Science Archive/Print Collector/Getty Images)

In the early hours of 30 April, 1943, the most audacious hoax of World War Two has just got underway. Its code-name - Operation Mincemeat.

The body of a British naval officer, Major William Martin, has been washed up on a Spanish beach. The dead man is carrying top-secret papers revealing details of a planned Allied invasion, and it’s not long before they fall into enemy hands.

But the plans are false and Major Martin doesn’t exist.

In a daring mission, British naval intelligence has requisitioned a corpse and dressed him in uniform to plant fake information. It works.

But for decades, no-one knew the real name of the man who’d played the biggest part: Major William Martin.

Enter Roger Morgan, an amateur historian. He tells Jane Wilkinson how Operation Mincemeat unfolded and how he uncovered the major’s true identity.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

Recent episodes explore everything from the death of Adolf Hitler, the first spacewalk and the making of the movie Jaws, to celebrity tortoise Lonesome George, the Kobe earthquake and the invention of superglue.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: Eva Peron – Argentina’s Evita; President Ronald Reagan and his famous ‘tear down this wall’ speech; Thomas Keneally on why he wrote Schindler’s List; and Jacques Derrida, France’s ‘rock star’ philosopher.

You can learn all about fascinating and surprising stories, such as the civil rights swimming protest; the disastrous D-Day rehearsal; and the death of one of the world’s oldest languages.

(Photo: William Martin's ID card. Credit: National Archives, Kew)

In May 1986, a new airport opened in Knock in the west of Ireland. It was the dream of an Irish priest, Monsignor James Horan, who raised millions to have it built.

The location for the airport seemed impossible – set in the boggy, foggy hills of rural County Mayo.

However, Knock attracts more than a million pilgrims every year, who come to visit the supposed site of an apparition by the Virgin Mary and other saints.

So, Horan convinced politicians that this remote western landscape could host a gateway to the world, and service the pilgrims who come to visit the shrine of Knock.

Pearce Concannon was working at the local Knock Shrine when the airport opened and remembers when Horan asked him to quit his job and become a firefighter at his new airport. He speaks to Colm Flynn.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

(Photo: Monsignor James Horan in front of the first plane to arrive at the airport. Credit: Ireland West Airport)

In February 1979, after the Shah left Iran, religious leader Ayatollah Khomeini flew back to Tehran from Paris.

He had been in exile and was greeted by millions of people lining the streets.

In 2011, Mohsen Sazegara who worked for the Ayatollah, spoke to Louise Hidalgo.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

Recent episodes explore everything from the death of Adolf Hitler, the first spacewalk and the making of the movie Jaws, to celebrity tortoise Lonesome George, the Kobe earthquake and the invention of superglue.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: Eva Peron – Argentina’s Evita; President Ronald Reagan and his famous ‘tear down this wall’ speech; Thomas Keneally on why he wrote Schindler’s List; and Jacques Derrida, France’s ‘rock star’ philosopher.

You can learn all about fascinating and surprising stories, such as the civil rights swimming protest; the disastrous D-Day rehearsal; and the death of one of the world’s oldest languages.

(Photo: Ayatollah Khomeini on the flight back from exile. Credit: Gabriel Duval/AFP via Getty Images)

If journalism is the first draft of history, what happens if that draft turns out to be flawed? The History Bureau revisits the defining stories of our times with the reporters who first covered them. What did they get right first time around? And, in the chaos and confusion of unfolding events, what did they miss?

Season 1: Putin and the Apartment Bombs. In September 1999, just weeks after a 46-year-old Vladimir Putin became Prime Minister, four bombs blew up four apartment buildings across Russia, killing hundreds of people while they slept. The attacks plunged the country into panic. Families fled their homes. Residents patrolled their blocks around the clock. An entire nation paralyzed by fear. But who did it? It's a mystery that has fuelled some chilling theories. The government blamed Chechen militants. Many reporters agreed. But then the whispers started. Was something even more sinister going on?

If you're in the UK, listen first to The History Bureau on BBC Sounds - or elsewhere in the world, listen on BBC.com or wherever you get your podcasts.

In 2005, a new show was launched on television in Afghanistan to find new musical talent – it was called Afghan Star and was inspired by formats like American Idol and the X-Factor.

The programme came after the music industry in Afghanistan had been decimated under the Taliban between 1996 and 2001.

Music has been culturally important in Afghan history, however, playing music and musical instruments had been banned whilst the Taliban were in power.

Jahid Mohseni was the development producer for Afghan Star, he has been speaking to Tim O’Callaghan.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

(Photo: The first season of Afghan Star. Credit: MOBY Media Group)

In December 1999, torrential rain in Venezuela led to floods and mudslides. Government estimates put the number killed at 3,000 but other reports suggest between 10,000 and 30,000 were killed. Many bodies were buried under mud, rocks or trees. Tens of thousands more people were made homeless.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.