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Egypt marks protests anniversary in Tahrir Square

25 January 2012 Last updated at 09:45 GMT

Tens of thousands of Egyptians have gathered in Cairo's Tahrir Square on the first anniversary of the uprising which culminated in the toppling of President Hosni Mubarak.

Some are celebrating the success of Islamist parties in the first post-Mubarak elections, while others are calling for further political reforms.

Jon Leyne reports from Cairo.