TOPSHOTS Migrants sit in the carriage of a train headed to Serbia in the town of Gevgelija, on the Macedonian-Greek border, on July 21, 2015. The migrants, among them children and elderly people are trying to cross Macedonia and Serbia and enter the EU via Hungary. Hungarian authorities started building a fence along the country's border with Serbia earlier this week to halt the migrant influx. AFP PHOTO / ROBERT ATANASOVSKI