It has been months since Le Thi Nu has had breakfast. A street vendor who travels around Hanoi on a bicycle selling plastic slippers, high prices have forced her to cut spending on eating, even though a baguette would cost 15 cents. Standing outside a crowded restaurant on Quan Su Street, where a bowl of soup would cost more than half her monthly income, she finds it difficult to come to terms with the spending of the rich.

On the 900-mile trek of mostly desert that stretches between Eritrea and Egypt, hunting for humans has become routine. Eritrean refugees who have fled their homeland fall prey to Bedouin or Egyptian traffickers. The refugees are held for ransom. Those with relatives abroad who can pay for their release might survive. Those who do not are often killed. The United Nations confirms that some are harvested for their organs — their livers and kidneys sold on the black market — while others, the young and able, are sold off.