Participants march during a rally in central Seoul November 7, 2010. More than 20,000 workers from the Korean Confederation of Trade Unions (KCTU) and students rallied in central Seoul on Sunday to oppose the G20 Seoul Summit as well as to demand the guarantee of workers' basic human rights and abolition of discrimination against temporary workers. The G20 Summit will be held in Seoul from November 11 to 12. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: BUSINESS CIVIL UNREST POLITICS EMPLOYMENT)