A child, wrapped in a blanket, cries from the cold, as migrants and refugees wait for a bus at a registration camp in southern Serbian town of Presevo on January 20, 2016, as temperature fall to minus 15 Celsius degrees. As refugees continued to flow from Greece through the Balkans on their way to western Europe, aid workers sounded alarms over inadequate shelter from the current freezing temperatures and snowy conditions, particularly for children. [Photo/AFP]