Don Cheadle and Sudan's Darfur region

Actor Don Cheadle has a new mission in life: raising awareness about the atrocities being carried out in what the United Nations says is the world's worst humanitarian crisis.

Cheadle traveled throughout western Sudan's Darfur region in 2005, and the trip left him a changed man, so much so it was difficult to come back to "my comfortable life and take stock in all the privileges ... and do nothing," he said.

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