Demonstrators shout slogans during an anti-government protest in Sanaa January 29, 2011. Yemen's ruling party has called for dialogue with the opposition, the country's state news agency said late on Friday, in a bid to end anti-government protests fuelled by popular unrest across the Arab World. (Khaled Abdullah/Khaled Abdullah/Reuters)
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How leaders of Bahrain, Jordan, Syria and Yemen plan to keep control
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