Workers in the non-profit sector, which includes nurses and social workers, throw their shoes onto the steps of the stock exchange building, during a protest in Brussels March 29, 2011. The non-profit sector, numbering some 450,000 people, is complaining about the absence of a new working agreement, partly the result of Belgium lacking a fully fledged government. REUTERS/Thierry Roge (BELGIUM - Tags: EMPLOYMENT BUSINESS CIVIL UNREST)