As migrants from across the Middle East and Africa continue to make the journey to western Europe by the thousands, the flow of refugees traveling the “Balkan corridor” is now being constricted. Austria and some Balkan states have recently begun to cap the number of migrants allowed to enter their borders, and further restrict who is allowed to pass. Macedonia is limiting the entry of refugees to several hundred per day, and allowing only refugees from Syria and Iraq to enter. The bottleneck has resulted in a swift buildup of approximately 10,000 refugees and migrants along the Greece-Macedonia border fence, with Greek authorities warning that the number could climb to 70,000 by next month. Frustrated migrants have staged numerous protests, in some cases tearing down fences and gates, to be met with tear gas and Macedonian riot police.