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Irish musician Bono, left, check the sound of the microphone of Donald Kaberuka, right, President of the African Development Bank during a plenary entitled 'Delivring the Promise of Africa', at the Annual Meeting of the World Economic Forum, WEF, in Davos, Switzerland, Friday, January 26, 2007. Top business leaders, heads of state from around the world and NGOs gather here until Sunday. (KEYSTONE/Laurent Gillieron)