Tamil bomber kills nineCOLOMBO, Sri Lanka — A Tamil Tiger rebel drove an explosive-laden tractor to a military camp in eastern Sri Lanka early yesterday. At least nine people, including the bomber, were killed. The attack came a day after at least one rebel propeller plane bombed a Sri Lankan air force base.— Page 13Plans to boycott electionsHARARE, Zimbabwe — Zimbabwe’s battered but emboldened opposition leader threatened to boycott planned elections next year as church leaders launched an outspoken appeal for democracy in the mounting challenge to President Robert Mugabe. — Page 14