Migrants wait to board a train at the train station in Tovarnik
Migrants wait to board a train at the train station in Tovarnik, Croatia September 19, 2015. Hungary and Croatia traded threats on Saturday as thousands of exhausted migrants poured over their borders, deepening the disarray in Europe over how to handle the tide of humanity. More than 20,000 migrants, many of them refugees from the Syrian war, have trekked into Croatia since Tuesday, when Hungary used a metal fence, tear gas and water cannon on its southern border with Serbia to bar their route into the European Union. REUTERS/Stoyan Nenov