Iranian migrants who have been stranded at the Greek-Macedonian border warm themselves next to a makeshift fire at the northern Greek border station of Idomeni, Sunday, Dec. 6, 2015. About 2,000 people remain stuck on the Greek side of the border, the Greek authorities said Sunday as Macedonia and other Balkan countries refuse to let them through, considering them economic migrants. (AP Photo/Petros Giannakouris), APTOPIX