A sign is seen on the traditional dagger of a tribesman loyal to the Shi'ite Houthi group as he takes part in an anti-government sit-in staged by the group outside Amran city, the capital of Amran province north of the Yemeni capital Sanaa April 9, 2014. Fighters loyal to the Shi'ite tribe, who have repeatedly fought government forces since 2004, are trying to tighten their grip on the north as Yemen moves towards a federal system that gives more power to regional authorities. The sign reads: "Allah is the greatest. Death to America, death to Israel, a curse on the Jews, victory to Islam." REUTERS/Khaled Abdullah (YEMEN - Tags: POLITICS CIVIL UNREST RELIGION)