U.S. works to connect businesses with Sub-Saharan market. Acting U.S. Commerce Secretary Rebecca Blank last week launched the "Doing Business in Africa" campaign at an event in Johannesburg, South Africa. The campaign to promote economic growth, trade and investment in Africa, is part of a larger U.S. strategy toward Sub-Saharan Africa issued by President Obama in June. The strategy aims to help countries in the region diversify their economies beyond natural resources development...