Since Syria’s civil war began, six million people have left the country and seven million more have been internally displaced. Now Bashar al-Assad’s regime has been overthrown by rebels, many refugees are wondering if they can return to their home. According to the UN, it’s the world’s largest refugee crisis.

BBC journalist, Lina Shaikhouni, explains what caused this crisis and we hear from three Syrian refugees in Germany, Lebanon and the UK.

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