VIDEOS: The human side of the European migrant crisis

Thousands of Syrians, Afghans and Iraqis travel from Greece to the Former Yugoslav Republic of Macedonia. 

Macedonia has stepped up security on its border with Greece, blocking thousands of migrants from entering and leaving them stranded on a dusty field.

The government said it is proclaiming a state of emergency on its borders and deploying troops to stem a surge of migrants from the Middle East, Asia and Africa that has overwhelmed the economically-impoverished Balkan country.