"We will try again," Mohammad Amin Ibrahimi, a teacher from Kabul, says as he looks west towards the hills of neighbouring Croatia, a country he has tried to enter 30 times in his dream to bring his family to the European Union. For the past six months, each attempt has been cut short by Croatian border police, who have pushed them back to Bosnia, where Ibrahimi is currently sheltering in an abandoned house with his wife and two-year-old daughter.