U.S. Vice-President Joe Biden gestures as Croatia's President Kolinda Grabar-Kitarovic looks on during a joint press conference after Brdo-Brijuni Process summit in Zagreb, Croatia, Wednesday, Nov. 25. 2015. U.S. Vice President Joe Biden arrived in Zagreb Wednesday for a Western Balkans summit, highlighting renewed interest from Washington in the fragile region as it deals with an unprecedented influx of refugees. (AP Photo/Pool via AP)