At the invitation of His Excellency Alassane OUATIARA, President of the Republic of Côte d'Ivoire and Mr. Moussa FAKI MAHAMAT, Chairperson of the African Union Commission, His Excellency Paul BIYA, President of the Republic of Cameroon, and his wife Mrs Chantal BIYA, left Yaounde early this afternoon for Abidjan (Côte d'Ivoire) to attend the s" African Union-European Union Summit which will take place on 29 and 30 November 2017, under the central theme "Investing in the Youth for a Sustainable Future".