Sarin gas attack on the Tokyo subway

US troops went on the rampage through a Vietnamese village in March 1968, killing men, women and children in cold blood. 11-year old Pham Thanh Cong survived, but the rest of his family was killed. In 2012 he spoke to Neal Razzell about his memories of the bloodbath.Photo: Pham Thanh Cong now.Credit Hoang Dinh Nam/AFP/Getty Images.

13 Mar 20188min

An eyewitness account of Stalin's purge of top Soviet leaders during the 1930s, when millions of Soviet citizens were executed or sent to labour camps.British diplomat Sir Fitzroy Maclean, spoke to the BBC in the 1980s about his memories of Moscow during the Great Terror, when Stalin's repression was at its height. Maclean attended the show trial of one of the foremost Soviet leaders, Nikolai Bukharin who was accused of conspiracy and was later executed. Photo: Portrait of Russian Communist leader and theoretician Nikolai Bukharin ,a former editor of Pravda and a member of the Central Organization of the Communist Party of the Soviet Union, circa 1920. (Photo by Hulton Archive/Getty Images)

12 Mar 201810min

Independent Azerbaijan changed its alphabet from Russian Cyrillic script to the Latin alphabet in 2001. The new letters symbolised a break with the country's Soviet past, but presented a difficult challenge for publishers and journalists and schoolchildren. Olga Smirnova has been talking to Elchin Shixli and Shahbaz Xuduoglu.Photo: Staff members of Azerbaijan's Ustarat newspaper prepare copy July 31, 2001 in their Baku headquarters for the following day, August 1, when all newspapers, according to government decree, had to switch the alphabet of their Azeri text from Cyrillic to Latin. (Photo by Yola Monakhov/Getty Images)

9 Mar 20188min

In March 1921, Marie Stopes opened Britain's first birth control clinic in London. The Mother's Clinic in Holloway offered advice to married mothers on how to avoid having any more children. Hear testimonies on the early days of birth control in Britain from the BBC archive. This programme was first broadcast in 2013.(Photo: Dr Marie Stopes, photographed in 1953. Credit: Baron/Getty Images)

8 Mar 20189min

Hannah Arendt was one of the most influential political thinkers of the 20th-century. Born into a German-Jewish family, she fled Germany in 1933 as the Nazis consolidated their power, eventually reaching America, where she published her seminal works on totalitarianism and the human condition She is also remembered for her phrase, the banality of evil, to describe the Nazi war criminal Adolf Eichmann at his trial in Jerusalem in 1961. Louise Hidalgo talks to Hannah Arendt's former assistant, Jerome Kohn, and listens through the archives to those who knew her.Picture: Hannah Arendt in 1966. (Credit: Fred Stein/DPA/PA)

7 Mar 20189min

Students at deaf-only Gallaudet University in Washington DC shut-down the campus in protest when the board of trustees appointed a hearing President in March 1988. They barricaded the campus with buses, marched to the White House and made the front page of the New York Times. Claire Bowes has been speaking to Dr I King Jordan, who was eventually appointed the first ever deaf President in the University's long history.(Photo: Student protestors, courtesy of Gallaudet University)

6 Mar 201812min

Russia's disastrous war on the Eastern Front became a catalyst for revolution at home. In 1914, Russia went to war against Germany and the Austro-Hungarian empire. But Russia was unprepared for a conflict on such a scale. Millions were killed or wounded at the front. There were chronic shortages at home. Popular anger led to the fall of the Tsar and the start of the Russian revolution. Using archive recordings we tell the story of the war in the East. Photo: Russian soldiers flee through a village after a provocateur announced that the German cavalry had broken through circa 1916. (Photo by Hulton Archive/Getty Images)

2 Mar 201810min

In March 1968, Chairman Mao officially launched a scheme to improve healthcare in rural China, by giving thousands of people basic medical training and sending them out to work in villages. They were known as the “barefoot doctors”.Gordon Liu is a Professor of Economics at Peking University. He tells Lucy Burns about his memories of working as a barefoot doctor.Picture: Gordon Liu

1 Mar 20188min