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Celebrating Rio de Janeiro's African roots

25 August 2012 Last updated at 00:54 BST

A recent discovery during Olympic renovations of a major slave arrival quay in Rio de Janeiro has highlighted the city's African roots, and could be included as a Unesco World Heritage site.

But Rio's Afro-Brazilians are both concerned - and hopeful - about how Olympic investments will affect black heritage and business in their city.

The BBC's Quentin Sommerville reports.