1. African Studies Program, Walsh School of Foreign Service & Department of Government, Washington, DC, USA
2. US Geological Survey, Reston, VA, USA
3. Science, Technology and International Affairs, Walsh School of Foreign Service, Georgetown University, Washington, DC, USA
4. Institute for International Migration, Georgetown University, Washington, DC, USA
5. Aspen Institute, Washington, DC, USA
6. Institute for International Migration, Georgetown University, Washington, DC, USA