The Euro Crisis Intensifies: Questions on Greece and the Debt Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email European Union leaders during a summit at the EU headquarters on December 9, 2011 in Brussels. Feuding European Union leaders failed to agree a new treaty to tackle the debt crisis . ( JOHN THYS/AFP/Getty Images / Getty ) Produced by Leo Duran Produced by PRI and WNYC