A Greek prime minister torn between accepting harsh bailout terms and a rebellion by the left wing of his party decides to call a referendum to break the political deadlock. Four years ago, George Papandreou, fearing the loss of his socialist PASOK party's parliamentary majority, stunned his EU partners by announcing his intention to put austerity measures demanded by international creditors to a popular vote. Back then, European leaders browbeat Papandreou into backtracking rather than stake the future of the single currency on the will of angry Greek voters.