World hunger: What's America's role?

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Seventy-million people are "food insecure." Famine has been declared already in one country and predicted in three more — in Africa and the Arabian Peninsula. The UN set a deadline for tomorrow: $4.4 billion for food and water. Less than a tenth has been received despite drought, disease and warfare. The US has led the world in past disaster relief, but President Trump wants massive cuts, and his aides are asking why America should care in the first place. Meantime, humanitarian groups say Africa faces what could be "one of the biggest humanitarian crises since World War II."