A protestor throws a molotov cocktail at riot police outside the parliament in Athens on December 6, 2011, during demonstrations to commemorate the police killing of a student three years ago which sparked violent riots lasting weeks. Pupils and students marched to mark the December 6, 2008 death of Alexis Grigoropoulos, 15, shot by police as Greece first came under pressure from the eurozone debt crisis. AFP PHOTO/ Angelos Tzortzinis (Photo credit should read ANGELOS TZORTZINIS/AFP/Getty Images)