Three years on, what’s become of the EU-Turkey migration deal?

In March 2016, European governments breathed a sigh of relief as the European Union reached a deal with Turkey designed to stop hundreds of thousands of refugees and migrants heading into the heart of Europe. For many of those who had fled war, hunger and poverty hoping for a bright future on the continent, the deal shattered their dreams.
Three years on, here is a look back at the agreement and the effect it's had on migration.
What did the EU-Turkey deal say?
One of the main provisions of the deal, which came into effect on March 20, 2016, was that all those arriving on Greek islands from the nearby Turkish coast - the preferred route at the time - would be detained and returned to Turkey unless they successfully applied for asylum in Greece. They wouldn't be able to move on to the Greek mainland, from where hundreds of thousands before them had...