Members of the Solidarity trade union walk past burning plastic chairs in front of the parliament building during the biggest demonstration in three years against the government's economic policy in Warsaw on June 30, 2011. Several thousand union activists rallied in the Polish capital accusing the centre-right government of sidelining social and economic problems, as Poland braces to take the helm of the EU. Solidarity is best known internationally for having helped bring down Poland's communist regime in 1989.AFP PHOTO / JANEK SKARZYNSKI