SEC. KERRY IN AFRICA / SUDAN, NIGERIA CRISES Host Carol Castiel talks with Ambassador David Shinn, Professor of International Affairs at The George Washington University and former ambassador to Ethiopia and Burkina Faso, and Richard Downie, Deputy Director and Fellow with the CSIS Africa Program, about US Secretary of State John Kerry’s recent visit to Africa, the plight of Nigeria’s missing girls and prospects for resolving the civil war in South Sudan.