A riot policeman is engulfed by flames after a protester threw petrol bombs in Athens’ Syntagma square during a 24-hour labour strike September 26, 2012. Greek police fired teargas at hooded youths hurling petrol bombs and stones as tens of thousands took to the streets in Greece’s biggest anti-austerity demonstration in months on Wednesday. REUTERS/Yannis Behrakis (GREECE – Tags: BUSINESS CIVIL UNREST TPX IMAGES OF THE DAY)