Lawmaker Kim Sun-dong (bottom R) of the Democratic Labour Party detonates a tear gas canister towards the chairman's seat at the National Assembly, to try to stop the ruling Grand National Party's move to ratify a bill on a free trade agreement with the United States, in Seoul Nov 22, 2011. [Photo/Agencies] 

A security officer restrains lawmaker Kim Sun-dong (bottom R) of the Democratic Labour Party after Kim detonated a tear gas canister towards the chairman's seat at the National Assembly, to try to stop the ruling Grand National Party's move to ratify a bill on a free trade agreement with the United States, in Seoul Nov 22, 2011. [Photo/Agencies]