BRUSSELS - BELGIUM - 07 FEBRUARY 2012 -- European Policy Centre (EPC) and Notre Europe Policy Dialogue -The Maastricht Treaty - 20 years later. -- Hans Martens, Chief Executive EPC; Jacques Delors, former President of the European Commission; President, Notre Europe and Yves Bertoncini, Secretary General, Notre Europe. -- PHOTO: Juha ROININEN / EUP-IMAGES