Destitute nomads from Mali came to Christine Wells in Northern Upper Volta in search of pasture but found a wasteland. Here a woman pounds in a mortar, the last few grains in her family. - - Drought. Five years of subnormal rainfall has brought severe drought and tragedy to Upper Volta, one of the six affected countries of the Sahelian Zone along the southern edge of the Sahara - a region in which there is increasing human suffering and loss