President Mahama Reminds African Brand Experts Of Need To Carve Out Positive Perception About Continent President John Mahama has called on marketers and Brand Experts across Africa to collaborate in changing the negative perception about the continent. He said drafting workable strategies towards achieving this long overdue vision is urgently needed. President Mahama was opening the first United Nations World Tourism Organisation Conference in Accra. The three day conference is being held under the theme "Enhancing Brand Africa, fostering Tourism Development". GBC