Migrants are seen through the window of a police car at the Greek-Macedonian border, as they wait to be allowed by Macedonian police to cross the border, Idomeni, northern Greece, Thursday, Aug. 27, 2015. Thousands of migrants have arrived on Greek islands so far this year, hoping to head north to other more prosperous European countries such as Germany, the Netherlands and Scandinavian countries. (AP Photo/Santi Palacios)