Reuters: Tens of thousands of people marched in capital cities across Europe on Saturday to protest about the economic crisis and urge world leaders to act on poverty, jobs and climate change at a G20 summit next week. Chanting “tax the rich, make them pay,” protesters marched through London waving banners saying “People before Profit,” at the start of a week of protests that reflected growing public anger over bankers’ pay and their role in the crisis. Leaders from the world’s 20 …