George Papandreou, leader of Greece's main opposition Socialist Party, reacts to tear gas while speaking to protesting farmers who used tractors to block one of the entrances to the main port of Piraeus, near Athens, Tuesday, Feb. 3, 2009. Police fired tear gas and clashed with farmers for a second straight day Tuesday at Greece's largest port. The violence occurred after police stopped protesters who sailed from the island of Crete with their tractors, seeking to stage a protest in the capital, Athens.