Over a period of 100 days from July to October 2009, 2,400 people stood on the fourth plinth in Trafalgar Square for one hour. They were free to do as they chose during this period in the spotlight. Nobody could predict what would happen or the scale of the response. Many thousands applied for the 2,400 slots and candidates were selected randomly. Millions watched the events as they were all filmed and available online. Hundreds of thousands continued...