Under the deal, Turkey agreed to take back refugees and migrants that had made it to Europe from its shores. In exchange, the EU agreed to settle thousands of Syrians already in Turkey — one for each Syrian Turkey takes back from the Greek Islands.
More than 152,000 refugees and migrants have landed in Greece so far this year — many of them on Lesbos.
Pope Francis will visit the island later this month to show solidarity with the suffering of refugees landing on its shores.
Cassandra Vinograd is a Senior Writer and News Editor. Before joining NBC News, she worked as a London-based correspondent for The Associated Press and specialized in politics, foreign affairs and defense.
Vinograd previously worked as an editor for The Wall Street Journal in Brussels and London.
She has reported extensively from Afghanistan and on West Africa and the Middle East.