Police blocks off a part of the Piraeus port from farmers who arrived from the southern Greek island of Crete on February 2, 2009 . Farmers clashed with police on the mainland port of Piraeus as they headed to a protest against prices they consider too low for their products and tried to pass the police blockade to travel with a convoy of 500 tractors to hold a rally outside the Ministry of Agriculture in Athens, near Piraeus. AFP PHOTO/ LOUISA GOULIAMAKI (Photo credit should read LOUISA GOULIAMAKI/AFP/Getty Images)