30/12/2017 GMT

Tanya Beckett looks back at five of the most memorable stories from Witness over the last 12 months, including an archaeologist who has worked on the Terracotta Army site in China.

In this special edition of Witness, Tanya Beckett looks back at five of the most memorable stories from the last 12 months. We'll meet an archaeologist who has worked on the Terracotta Army site for decades in China, a friend of anti-apartheid icon Steve Biko and the mother of one of Argentina's 'disappeared' children.

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30 minutes