A child falls while walking with a man on the railway tracks near the border between Greece and Macedonia in the northern Greek border station of Idomeni, Thursday, March 3, 2016. Thousands of refugees and migrants wait on the border between Greece and Macedonia and about 30,000 refugees and other migrants are stranded in Greece, with 10,000 at the Idomeni border crossing to Macedonia. (Photo by Vadim Ghirda/AP Photo)





Migrants shout slogans as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant blocks the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant holds her baby as she blocks the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants shout slogans as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant boy stands next to the riot police as other migrants block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrant children hold posters as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant girl holds a poster during a protest at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant sits next to the riot police as other migrants block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants shout as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A man gestures as other migrants block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants gesture as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A Greek policeman stands on the railway tracks as migrants protest at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant with a child sits in front of a line of Greek policemen on the railway tracks at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants lie on railway tracks as they protest in front of a line of Greek policemen at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A young migrant cries as she waits to cross the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants hold a banner as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants wait to cross the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants wait to cross the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant holding a child waits to cross the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants argue between themselves as they wait to cross the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants argue between themselves as they wait to cross the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants hold a banner as they block the railway track at the Greek-Macedonian border, near the village of Idomeni, Greece March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants who are waiting to cross the Greek-Macedonian border, sit by the fire near the village of Idomeni, Greece, March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants who are waiting to cross the Greek-Macedonian border, gather to receive travel documents near the village of Idomeni, Greece, March 3, 2016. (Photo by Marko Djurica/Reuters)





A migrant who is waiting to cross the Greek-Macedonian border, sits by the fire near the village of Idomeni, Greece, March 3, 2016. (Photo by Marko Djurica/Reuters)





Migrants who are waiting to cross the Greek-Macedonian border, try to bring down a tree near the village of Idomeni, Greece, March 3, 2016. (Photo by Marko Djurica/Reuters)