City of Ghosts

For four long years Islamic State ruled its "caliphate" from its capital, the city of Raqqa.

IS propaganda painted it as a pure paradise and extremists travelled from around the globe to join the terror group.

Now the city is giving up its secrets.

On Four Corners Middle East correspondent Matt Brown goes on an intense journey into the city freed from the Islamic State dictatorship.

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S2018E04 - Everything Forbidden, Anything Possible