Former U.S. senator Mike Gravel (C) talks to demonstrators at their camp at the Lindenplatz square in Zurich October 31, 2011. The demonstrators gather since two weeks in the camp to protest against bankers, financiers and politicians they accuse of ruining global economies and condemning millions to poverty and hardship through greed. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: POLITICS BUSINESS CIVIL UNREST)