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Introduction: 
The imprisonment of Dr. Cu Huy Ha Vu, 53, to seven years in prison on anti-government propaganda charges in April 2011, frustrated but did not end a remarkable outpouring of popular support inside Vietnam demanding his release. Dr. Vu, who has extraordinarily broad support in many unrelated sectors of society, has become a cause célèbre through the power of the internet, and this has led to an unprecedented human rights challenge to the Vietnamese government that is far from over.