Tony Elumelu, chairman of Heirs Holdings Ltd., speaks at the US-Africa Business Forum in Washington, D.C., U.S., on Tuesday, Aug. 5, 2014. A two-decade surge in growth in Africa suggests the poorest continent is starting to come to grips with its challenges and has raised the prospect of the 'African lions' emulating the 'Asian tiger' economies in the 21st century. Photographer: Drew Angerer/Bloomberg via Getty Images