The scoop of the century on the eve of World War II.

How a young British reporter witnessed the German military build-up just days before the invasion of Poland in 1939.

We hear Clare Hollingworth's own account of a daring trip across the border.

Photo: Clare Hollingworth in 1978. Credit: BBC

The Summer of Love, 1967, and the commune in Colorado known as Drop City, where rumours of free love, drugs and a lot of music attracted not only hippies from all over the United States, but plenty of tourist buses too.

photo: Getty Images

How villagers in a remote region of Cameroon awoke one morning to find hundreds of their friends and neighbours had mysteriously died in the night.

We hear from the scientists who were sent in to find out what had happened.

At the height of the Spanish Civil War, thousands of Basque children were evacuated to safety in Britain.

In 1937, Herminio Martinez was sent away by his parents at the age of seven. It was 23 years before he saw them again.

Herminio Martinez talks to Witness about his memories of the evacuation and the reunion with his family.

PHOTO: Hutton Archive/Getty Images

It was a pivotal moment in American popular culture.

Three days of music and much more on a muddy farm in upstate New York - the Woodstock festival of 1969.

A self-confessed "Woodstock survivor" tells us how it changed his life.

The story of how students at the officially designated "white" University of Cape Town campaigned in support of an academic who had fallen foul of apartheid's racist laws.

Picture courtesy UCT.

Dr Spock's Baby and Child Care, a book that revolutionised the way people thought about bringing up children in the years after World War II.

The book sold half million copies within six months of publication in 1946.

We hear from Lynn Bloom, a friend of Dr Spock, and his biographer.

The theft of the Mona Lisa from the museum of the Louvre in Paris in August 1911.

The search for the famous painting would take two years and helped to cement its fame around the world.

We hear how even the famous artist Pablo Picasso was arrested during the police investigation that involved detectives in both Europe and America.

The bomb that destroyed the UN headquarters in Baghdad in 2003, killing 22 people, among them the UN Special Representative Sergio Vieira de Mello.

We hear from the UN mission's spokesman who was in the building when the blast occurred.

The failed attempt to overthrow the Soviet president Mikhail Gorbachov in August 1991.

Mr Gorbachov was held prisoner in his holiday dacha in the Crimea on the Black Sea while tanks and troops were deployed on the streets of Moscow.

One of Mr Gorbachov's neighbours recalls an abruptly curtailed telephone conversation, and a Moscow journalist remembers filming on the streets of a nervous capital.