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The trial of Derek Chauvin, the police officer accused of killing George Floyd, has started. Onlookers in the US city of Minneapolis took video showing Mr Chauvin - who's white - kneeling on the neck of Mr Floyd, who was black. The incident sparked protests in the US and across the world against police brutality and racism. Prosecutor and former Member of the Minnesota House of Representatives John Lesch joins Katty and Christian.