Caller: Over the weekend, the prime minister of Haiti was ousted from office after days of food riots. Prime Minister Jacques Edouard Alexis was fired by lawmakers for his failure to raise food production after seven people died in violence in several cities including the capital of Port-au-Prince. The upheaval in the poorest nation in the Western Hemisphere ought to be a signal to world leaders that what has become a growing crisis over world food prices must be addressed in a concerted …