Workers from the Athens central groceries market clash with police officers during a rally in front of the Bank of Greece in Athens April 6, 2012. Hundreds of workers protested outside the labour ministry and the Bank of Greece on Friday saying they have lost part of their savings in the national debt swap deal that formed a crucial part of Greece's bailout. REUTERS/Yorgos Karahalis (GREECE - Tags: POLITICS BUSINESS EMPLOYMENT CIVIL UNREST)