People stage a protest during a demonstration in Barcelona, on March 28, 2009, as part of a day of protests ahead of the G20 summit to be held in London on April 2, 2009 .US Vice President Joe Biden called for tens of thousands of protesters already on the streets of Europe ahead of a G20 summit next week to give governments a chance to tackle the economic crisis. Getty Images logo Getty Images 35 months ago

People stage a protest during a demonstration in Barcelona, on March 28, 2009, as part of a day of protests ahead of the G20 summit to be held in London on April 2, 2009 .US Vice President Joe Biden called for tens of thousands of protesters already on the streets of Europe ahead of a G20 summit next week to give governments a chance to tackle the economic crisis.