Students and trade unionists march through the streets of central Barcelona on March 14, 2002, to demand preservation of social welfare benefits in the face of a liberalizing Europe. It was the first of several street protests planned here during the European Union summit, which is set to conclude on March 16. REUTERS/Gustau Nacarino

Estudiantes y sindicatos marchan juntos el día 14 de marzo por el centro de Barcelona, REUTERS/Gustau Nacarino