A protester is apprehended by riot police on a street during an anti-government rally at the Seoul city hall plaza June 10, 2009. Tens of thousands of people including unionised workers, students and opposition parties' lawmakers gathered on Wednesday to mark the 22nd anniversary of the June 10 pro-democracy movement, to mourn the deceased former President Roh Moo-hyun and to denounce Lee Myung-bak administration. REUTERS/Jo Yong-Hak (SOUTH KOREA CONFLICT POLITICS)