Migrants and refugees leave by bus as solidarity groups protest behind a line of riot police during the forced evacuation of a makeshift camp close to the Greece-Macedonia border, near the village of Idomeni on May 24, 2016. 

Greek police on May 24 moved hundreds of migrants out of the overcrowded camp of Idomeni, launching a major operation to clear up the squalid tent city where thousands fleeing war and poverty had lived for months. In an operation that began shortly after sunrise, Greek police said they had put more than 1,500 people on buses to newly opened camps near Greece's second city Thessaloniki, about 80 kilometres (50 miles) to the south.
 / AFP / SAKIS MITROLIDIS        (Photo credit should read SAKIS MITROLIDIS/AFP/Getty Images)