US President Barack Obama shakes hands with Cuba's President Raul Castro during the United Nations General Assembly at UN headquarters in New York on September 29, 2015. (MANDEL NGAN/AFP/Getty Images)
A Kurdish refugee mother and son from the Syrian town of Kobani walk beside their tent in a camp on the Turkish-Syrian border on October 19, 2014 in Sanliurfa, Turkey. (Gokhan Sahin/Getty Images)