Argentines marching in Buenos Aires protesting against the death of Alberto Nisman
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Argentina: Mass rally in Buenos Aires over Nisman's death

Hundreds of thousands of people in Argentina have marched through Buenos Aires to demand answers over the death of a state prosecutor.

A month ago, Alberto Nisman's body was found with a gunshot wound to the head, just hours before he was due in Congress to present evidence against President Kirchner.

The BBC's Wyre Davies was at the protest.

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