On March 15th 1939, the German army occupied Czechoslovakia. Witness hears the story of one young boy who watched the German troops march into Prague and who later escaped on the Kindertransport. These were trains that brought thousands of mostly Jewish children out of Austria, Germany, Poland and Czechoslovakia, without their parents, to safety in Britain. That young boy went on to become a British MP and today sits in Britain's House of Lords; Alf Dubs tells Louise Hidalgo his story.

Picture: German troops enter the centre of Prague on 15th March 1939; the German leader Adolf Hitler visited the city the next day. (Credit: AFP/Getty Images)

A hundred years ago, photographer Sergei Prokudin-Gorskii travelled around the Russian Empire taking the first colour photographs of a world that was about to be swept away by the Bolshevik Revolution. Using a unique method of colour photography, which he had developed, he managed to capture images previously never seen. Dina Newman speaks to Michel Soussaline, Prokudin-Gorskii's grandson. Photo: Peasant Girls, 1909. Credit: Library of Congress; Famille Procoudine-Gorsky.

In March 1917 Tsar Nicholas II abdicated ending centuries of autocratic royal rule in Russia. The revolution started with demonstrations in the capital Petrograd (St. Petersburg) against the First World War and shortages of food. Troops joined the protestors in the streets, A Provisional Government was set up to replace Tsarist rule but it had to share power with a new Council of Workers and Soldiers Deputies, called the Petrograd Soviet. Hear eyewitness accounts of the revolution from the BBC radio archive.

Photo: 12th March 1917: Barricades across a street in St Petersburg, as a red flag floats above the cannons, during the Russian Revolution. (Photo by Hulton Archive/Getty Images)

In the early days of Aids, a misunderstanding made one man the face of the epidemic. French-Canadian air steward Gaetan Dugas developed the symptoms of HIV/Aids in the early 1980s, but a misreading of scientific data led to him being identified as "Patient Zero", giving the mistaken impression he was responsible for the spread of the disease.

Lucy Burns speaks to researcher William Darrow, who worked on the epidemic, and to Gaetan Dugas' friend Rand Gaynor.

Photo: Gaetan Dugas. Credit: Rand Gaynor)

In March 1977 a group of American Muslims took over a hundred people hostage in Washington. The siege ended after ambassadors from three Islamic countries helped with the negotiations. Simon Watts has been speaking to Paul Green, one of the hostages who was held for almost 40 hours.

PHOTO: Hamaas Abdul Khaalis, the leader of the hostage-takers, arriving for a court hearing in Washington with his wives (AP)

Georgia O'Keeffe was one of the world's most influential female artists - in 2014, her painting "Jimson Weed" sold for the highest price ever paid for a work by a woman. Famous for her vivid oil paintings of flowers, landscapes and animal skulls, she lived and worked in the wild dry canyons and deserts of New Mexico in the southern United States. Lucy Burns speaks to her former assistant Agapita Judy Lopez.

PICTURE: Journalists view 'Jimson Weed/White Flower No.1' by Georgia O'Keeffe at Tate Modern on July 4, 2016 in London, England. (Rob Stothard/Getty Images)

In the 1970s and 80s a deadly cocktail of toxic factory fumes and car pollution turned Mexico City into the world’s most polluted city. In response, the authorities came up with an ambitious solution: curb the use of each of the city’s two million cars for one day a week, the first time any country had tried such a bold plan.

(Photo credit: Alamy)

On 7 March 2005 a group of women held an unprecedented rally outside the Kuwaiti parliament. They were trying to force the all-male body to change the electoral law. Two months later they succeeded. Zeinab Dabaa has been hearing from Rola Dashti, one of the organisers of the protest, who later became one of the first women to be elected to her country's legislature.

(Photo: Kuwaiti candidates for the 2006 parliamentary election, Aisha al-Rashid (R) and Rola Dashti (C), the first ever women to be allowed to stand for office Credit: Yasser al-Zayya/AFP/Getty Images)

During World War One, two British nurses set up a first aid station just a few hundred metres behind the trenches of the Western Front. Mairi Chisholm and Elsie Knocker became known as “the Madonnas of Pervyse”. Mairi Chisholm spoke to the BBC in 1977.

(Photo: Mairi Chisholm (left) and Elsie Knocker. courtesy of Dr Diane Atkinson, author of Elsie and Mairi Go To War)

In 1998 someone cut the head off the most famous statue in Denmark. Inspired by a Hans Christian Andersen fairy tale, it's a bronze figure of a girl sitting on a rock in Copenhagen harbour. After a police search to find the head, it was Peter Jensen's job to reattach it to the mermaid's body.

Photo: The Little Mermaid in Copenhagen harbour. Credit: Reuters/Bob Strong.