President Obama in Africa — at Last

America's first black President is in Senegal today for only his second trip to Africa since a brief visit to Ghana during his first term. Tomorrow, he'll be in South Africa, where his visit may be overshadowed by the failing health of Nelson Mandela, that country's first black president. After creating high expectations for a new US relationship with the continent where his father was born, Obama's accused by some of being missing in action. We hear about shifting America's emphasis from aid to business investment, competition with China and whether Obama can polish his legacy.