Summary
EU president Donald Tusk Wednesday defended the use of barbed-wire fences against migrants, saying that securing the outer borders of Europe's passport-free Schengen area was a "pre-condition" to solving the refugee crisis.
The following day he will hold talks with Turkish President Recep Tayyip Erdogan in Istanbul.
His regional tour is aimed at laying the groundwork for a summit in Brussels on Monday between the EU and Turkey on a deal which the EU hopes will go a long way to halting the flow of migrants into the bloc.
Accepted migrants would then be flown directly from Turkey to EU countries.
...