Index number: EUR 25/5664/2017. In the absence of safe and legal routes into Europe, hundreds of thousands of refugees and migrants have travelled irregularly over the last few years, at considerable risk to their own lives. This has undeniably confronted European leaders with logistical, political and humanitarian challenges. The EU-Turkey deal, agreed in March last year was Europe’s signature response to these challenges. It has certainly stemmed the flow of migrants across the Aegean, but at considerable cost to Europe’s commitment to upholding the basic principles of refugee protection and the lives of the tens of thousands it has trapped on Greek islands. With European leaders touting its success, closing their eyes to its flaws, and seeing in it a blueprint for new migration deals with countries like Libya, Sudan, Niger and many others, this briefing serves as a cautionary tale.