In 1993, Denmark held a second referendum on greater EU integration, after a previous vote failed. But angry anti-EU demonstrators took to the streets of the capital, and riots followed. We speak to the former foreign minister who campaigned for a 'Yes' vote, and a former activist who protested against any Danish involvement in the EU, but who has since changed his mind about Europe.Image: Riot police in Copenhagen after Denmark voted Yes to ratify the Maastricht Treaty in May 1993. (Credit: AFP)