EDIRNE, TURKEY - SEPTEMBER 16: (TURKEY OUT) Syrian migrant children rest in a tent during their walk towards the Greece border on a road near Edirne, September 16, 2015 in Turkey. Since the beginning of 2015 the number of migrants using the so-called 'Balkans route' has exploded with migrants arriving in Greece from Turkey and then travelling on through Macedonia and Serbia before entering the EU via Hungary. The number of people leaving their homes in war torn countries such as Syria, marks the largest migration of people since World War II. (Photo by Gokhan Tan/Getty Images)