Turkey has restricted entry visas for Iraqis in a bid to limit foreign fighters reaching its territory and stem the flow of migrants and refugees to Europe. The European Union is banking on Turkish help to alleviate its worst migration crisis since World War Two, which saw more than a million people, including tens of thousands from Iraq, make the short sea crossing between Turkey and islands belonging to EU member Greece. Turkey has also been a transit point for fighters joining Islamic State, which controls part of the southern border with Syria.