Buses are parked near tents at a makeshift refugee camp at the Greek-Macedonian border near the northern Greek village of Idomeni, Tuesday, May 24, 2016. Greek authorities have begun an operation to gradually evacuate the country's largest informal refugee camp of Idomeni, on the Greek-Macedonian border, where more than an estimated 8,400 people have been living for months. (AP Photo/Darko Bandic), APTOPIX