[A Syrian woman cooks at the northern Greek border point of Idomeni, Greece, on Tuesday May 10, 2016. About 54,000 refugees and migrants are currently stranded in Greece as 10,000 are camped in Idomeni, after the European Union and Turkey reached a deal designed to stem the flow of refugees into Europe’s prosperous heartland. (AP Photo/Petros Giannakouris)]AMMAN, Jordan (AP) — A major aid agency says 27.8 million people around the world were internally displaced by conflict and natural disasters last year, or as many as the combined populations of New York City, London, Paris and Cairo.