A Venezuelan opposition protester throws back a tear gas canister at national guardsmen during riots in Caracas, February 27, 2004. Venezuelan troops firing tear gas and plastic bullets Friday to stop opposition protesters from marching to a G-15 summit site. Third World leaders are meeting to discuss ways of fighting poverty. In a note addressed to Venezuelan President Chavez, sign attached to demonstrator reads: "Hugo, the only way to stop me from protesting is to kill me." REUTERS/Howard Yanes JS/GN