A migrant man holding a boy react as they are stuck between Macedonian riot police officers and migrants during a clash near the border train station of Idomeni, northern Greece, as they wait to be allowed by the Macedonian police to cross the border from Greece to Macedonia, Friday, Aug. 21, 2015. Macedonian special police forces have fired stun grenades to disperse thousands of migrants stuck on a no-man's land with Greece, a day after Macedonia declared a state of emergency on its borders to deal with a massive influx of migrants heading north to Europe. (AP Photo/Darko Vojinovic)