[Athens, December 6. Image via Getty]

A demonstrator lies on the street during clashes in central Athens on December 6, 2009. Police clashed with hooded youths and the rector of Athens university was injured Sunday as violence flared in a demonstration to mark the anniversary of a teenager's killing by a policeman last year. AFP PHOTO / Angelos Tzortzinis (Photo credit should read Angelos Tzortzinis/AFP/Getty Images)