Slamming the door left them looking for a window. Desperate migrants, facing tear gas and razor wire at the newly shut Hungary-Serbia border, have found a new route north. Scores have begun walking across Serbia into Croatia, with plans to head toward Schengen-member Slovenia, then Austria, and finally Germany. Croatian leaders said today they are ready to welcome the refugees, but Austria has implemented temporary measures limiting the numbers allowed across its border into Germany. Meanwhile, Hungary has detained over 500 refugees and is starting to issue criminal charges, offering even more incentive to get out.