An app that helps doctors keep in touch with patients in Uganda, another that helps teachers keep up with technology in Zambia, and a website that tells the stories of Rwandan genocide survivors. These are just some of the businesses that have been developed by a group of young African entrepreneurs, sought out by President Obama. The entrepreneurs are part of the president’s Young African Leaders Initiative – in which 500 hundred sub-Saharan Africans between the ages of 25 and 35 have been brought to study at US universities this summer. Twenty five of them are at Yale University for six weeks.