Signature of the guest book by Bulgarian Deputy Prime Minister for European Policies Coordination and Institutional Affairs, Minister of Education and Science M. Kuneva with Permanent Representative of the Republic of Bulgaria to the UNOG Ambassador I. Piperkov, Director for Accelerators and Technology F. Bordry, Ambassador of the Republic of Bulgaria to Switzerland and to the Principality of Liechtenstein M. Plugtschieva, Director for Finance and Human Resources M. Steinacher, Director-General F. Gianotti and Director for Research and Computing E. Elsen.