Reuters: Southern Africa faces food shortages as drought, exacerbated by the El Nino weather pattern, delays planting and stunts crops across the region, the U.N.'s Food and Agriculture Organization (FAO) has said in an alert. "The presence of a strong El Nino episode in 2015/16 raises serious concerns regarding the impact on food insecurity," the FAO said in the alert, issued late on Tuesday. Regional harvests last season were also badly affected by drought conditions, raising the specter of back-to-back...