Opinion: We cannot turn our backs on South Sudan

In 2011, drought struck the Horn of Africa, but the humanitarian response came too late: A quarter of a million people lost their lives in Somalia. Last year, a combination of conflict and drought again threatened millions, but timely humanitarian action by national governments and the international community, including the United States, averted the worst. Warning lights are again flashing across East Africa. It is time for President Trump, the Congress and other world leaders to respond