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In 2008, an earthquake in China’s Sichuan province killed almost 90,000 people. Many were crushed when school buildings collapsed, exposing their poor construction quality.

To counter perceived government suppression of information, the artist Ai Weiwei made an artwork from 90 tonnes of steel bars salvaged from the schools' wreckage.

In 2011, Ai Weiwei was detained in harsh conditions for 81 days and banned from leaving China. While his official charge was tax evasion, his detention was widely viewed as a response to his activism. But the artwork, Straight, became a global sensation. Ai Weiwei tells the story to Ben Henderson.

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: Ai Weiwei in front of his artwork, Straight. Credit: Leon Neal/AFP via Getty Images)