A broom used by demonstrators is left on the ground next to a sign that reads "Free" marking the free tent area at Madrid's Puerta del Sol encampment June 6, 2011. Spaniards protesting over the handling of the country's economic crisis continue to keep their tents in central city squares this week, as a wave of similar protests spread to other major European cities. REUTERS/Susana Vera (SPAIN - Tags: CIVIL UNREST SOCIETY ELECTIONS POLITICS)