Greece's euro drama: geopolitical concerns may have already played a role

Alexis Tsipras firmly believes the EU would not dare let Greece go. But is the prime minister right about his country's strategic importance?

The arrival in a week of more than 9,000 refugees in the Greek islands highlights the fact that Greece's euro drama is being played out in a turbulent neighbourhood. "I have no doubt this will affect Europe, also in a geopolitical sense," Donald Tusk, the president of the European council, told the European parliament this week.

But how?