Protesters clash with riot police during
Protesters clash with riot police during a demonstration in Thessaloniki on September 10, 2011. Clashes broke out between police and demonstrators today as thousands took to the streets of Greece’s second city of Thessaloniki in a mass protest against austerity measures. AFP PHOTO/Sakis Mitrolidis (Photo credit should read SAKIS MITROLIDIS/AFP/Getty Images)