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A president, a peace activist and a women's rights campaigner, all women, were named winners of the 2011 Nobel Peace Prize.

The three women from the developing world - Liberia's President Ellen Johnson-Sirleaf, Liberian peace activist Leymah Gbowee and Yemeni women's rights activist Tawakul Karman - were named by the Norwegian Nobel Committee at a ceremony in Oslo on Friday.

They were honoured for their "non-violent struggle for the safety of women and for women's rights to full participation in peace-building work", Thorbjoern Jagland, president of the committee, said.

Al Jazeera's Barnaby Phillips takes a close look.

Source: Al Jazeera