It was one of the worst atrocities of the Spanish Civil War.

German bombers, backing Franco's fascist forces, virtually destroyed the Basque town.

Hear first-hand accounts of the bombing from the BBC archives.

(Photo: A copy of Picasso's mural, in the town of Guernica itself)

In 1983 a German magazine believed it had found Hitler's wartime diary.

It sold the rights to other papers including the Times in London.

Journalist Phillip Knightley doubted their authenticity from the start.

As part of our series in the run-up to Britain's Royal Wedding we take you back to 1981 and the marriage of Prince Charles to Lady Diana Spencer.

Mishal Husain reports for Witness.

Photo: Associated Press

It is 21 years since a Romanian woman was finally able to uncover her family history - kept hidden for decades by the communist secret police.

Nick Thorpe reports for Witness.

In 1930, Gandhi led the famous Salt March against British rule in India. His great-grandson Tushar, retraced the route 75 years later.

Witness speaks to him about the power of peaceful protest. The programme also includes a newspaper account of the original march.

(Photo: 1930. Indian nationalist leader Mahatma Gandhi, and politician Mrs Sarojini Naidu, with a garland, during the Salt March protesting against the government monopoly on salt production.)

In 1993, around 80 people died in the fire that ended the siege at the headquarters of a Christian cult in Waco, Texas.

Sam Henry from Manchester, lost his wife and five children in the blaze.

He tells Witness how the cult's leader David Koresh, brainwashed his family.

In April 1961 Cuban exiles, backed by the US government, tried to overthrow Fidel Castro.

Fifty years ago boatloads of counter-revolutionaries stormed the beaches of a bay in Cuba.

They soon ran out of ammunition, and without backup their mission failed.

We hear from one of those exiles.

Picture: Captured - the US-backed force of Cuban exiles who attempted invasion at the Bay of Pigs, Credit: Three Lions/Getty Images

She was a Hollywood superstar - he was Prince of a tiny European state.

Their wedding turned into a media frenzy.

One of her bridesmaids remembers that day.

(Photo credit: Associated Press)

In 1982 people in the Syrian city of Hama rose up against the Assad regime.

We hear from two men who as children, lived through the government crackdown that followed.

(Photo credit: Hama skyline)

In 1957 a nuclear reactor in the north of England caught fire.

Witness hears from two men who helped bring things under control during Britain's worst nuclear accident.