Riot police follow a student's rally to mark the fourth anniversary of a deadly police shooting that triggered major riots, in Athens, Thursday, Dec. 6, 2012. Fifteen-year old Alexandros Grigoropoulos was shot dead by police in central Athens on Dec. 6, 2008, sparking riots in Greek cities that lasted nearly three weeks. The police officer convicted of the shooting was jailed for life in 2010. (AP Photo/Thanassis Stavrakis)
