Turkey's President Recep Tayyip Erdogan, right, and German Chancellor Angela Merkel, sit, prior to their meeting at the World Humanitarian Summit in Istanbul, Monday, May 23, 2016. World leaders and representatives of humanitarian organisations from across the globe converge in Istanbul on May 23-24, 2016 for the first World Humanitarian Summit, focused on how to reform a system many judge broken. (Kayhan Ozer/Pool Photo via AP)