[Children play in the makeshift refugee camp at the northern Greek border point of Idomeni, Greece, Saturday, April 2, 2016. Greece is pressing ahead with plans to start deporting migrants and refugees back to Turkey next week, despite mounting concern from the United Nations and human rights organizations that Syrians could be denied proper protection while some are allegedly even being forced back into their war-torn country. (AP Photo/Darko Vojinovic)]VIENNA (AP) — Just weeks ago, thousands of migrants a day were streaming into northern Europe. Now the influx has been dramatically crimped and Austria is claiming much of the credit.