As the world leaders gathered here on Saturday for the G20 summit, small groups of? protestors stormed the downturn Toronto, setting a car on fire, smashing glass windows of banks and shopping centres, and raising slogans like ?Capitalism is a failure. Revolution is the solution.?Although the city was equipped with large contingents of police, they by and large tended to avoid an violent confrontation with the protestors, even though the reinforcements they created were robust enough to quell the violence. Of the thousands of protestors, most were conducting peaceful demonstrations, while some small groups of black-clad youngsters were on a violent spree.?Demonstrators ignited road flares and swung sticks as they faced each other near the security perimeter in the heart of the city, where the Metro Convention Centre where world leaders assembled was located. The protests were coordinated by a number of interest groups and NGOs, both domestic and international.