Head of the United Nations Office for West Africa (UNOWA) Mohamed Ibn Chambas, Ghana's President Nana Akufo-Addo and African Development Bank (AfDB) President Akinwumi Adesina attend the opening of the 56th Ordinary Session of the ECOWAS Authority of Heads of State and Government in Abuja, Nigeria, December 21, 2019. REUTERS/Afolabi Sotunde