An ongoing humanitarian crisis in Yemen could pull the United States back to the Middle East. There are complicated geopolitics at play between Iran and Saudi Arabia, but bearing the brunt of it all are the children. CNN's Christiane Amanpour talks with Nima Elbagir and "Hunger Ward" director Skye Fitzgerald about how children in Yemen are literally starving to death as a result. #CNNi #WorldNews #CNN #News