Somali girls line up to receive a hot meal in Mogadishu last year after the worst drought in the Horn of Africa in decades, compounded by war, put millions in danger of starvation. Roberto Schmmidt/AFP/Getty Images hide caption

itoggle caption Roberto Schmmidt/AFP/Getty Images

Early morning view of an automated irrigation system in on a farm in Sudlersville, MD

Cliff Owen/AP hide caption

itoggle caption Cliff Owen/AP