Riot police stand near the euro sign in front of the European Central Bank (ECB) headquarters during an anti-capitalist “Blockupy” demonstration in Frankfurt May 31, 2013. Thousands of demonstrators from the movement seek to cut off access to the ECB and other financial institutions in Frankfurt on Friday, to protest their handling of Europe’s debt crisis. REUTERS/Kai Pfaffenbach (GERMANY – Tags: CIVIL UNREST BUSINESS POLITICS) – RTX106RF