People offer flowers and read signs at the the site where 15-year-old Alexandros Grigoropoulos was shot and killed by police a week ago, as a privately made street sign bearing his name decorates the impromptu shrine in central Athens, Saturday Dec. 13, 2008. Protesters are promising to remain on the streets of Greece, one week after the police killing of 15-year-old Alexandros Grigoropoulos sparked massive riots. The protests are driven in part by the widening gap between rich and poor in a country where the minimum monthly wage is Euro 658 ($850), graduates have poor job prospects and the government is making painful reforms to the pension system.