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BERLIN - GERMANY 25. 3. 2007 -- The heads of state of the 27 European Union nations pose for a family photo around German Chancellor Angela Merkel (C), whose country currently holds the EU presidency, 25 March in front of Berlin's landmark Brandenburg Gate, at the end of weekend celebrations of the 50th anniversary of the Treaty of Rome which laid the foundation for the EU. French President Jacques Chirac (R), German Chancellor Angela Merkel and Belgian Prime Minister Guy Verhofstadt (back) -- PHOTO: GORM K. GAARE / EUP- IMAGES .