"It's really hard to stop 30,000 arms buyers from getting into the Excel centre, but it's really easy – and it feels amazing! – to stop a truck with a tank on from driving into the arms fair."

In this episode of Q:Witness we talk about the many ways that people can help build a peaceful society. We hear from Sam Walton who helped organise the headline-grabbing actions to try and stop the world's largest arms fair in London this September; Ellis Brooks joins us to share news and hopes around peace education in British schools; and we celebrate this year's Nobel Peace Prize winner.

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