This book describes the interdisciplinary work of the United States Agency for International Development (USAID)'s Famine Early Warning Systems Network (FEWS NET) and its influence on methodological and development policies in the US. FEWS NET operational needs have driven science in biophysical remote sensing applications through its collaboration with NASA, NOAA, USGS and USDA, and socio-economic methodologies through its involvement with USAID, the United Nation's World Food Program and numerous international non-governmental organizations such as Save the Children, Oxfam and others. The book describes FEWS NET's systems, methods and presents several illustrative case studies that will demonstrate the integration of physical and social science disciplines in its work.