A Yemeni tribesman from the Popular Resistance Committees, supporting forces loyal to Yemen's Saudi-backed President Abedrabbo Mansour Hadi, holds a position in the country's third city Taez, on December 15, 2015. Yemeni rebel artillery and tanks killed seven civilians in residential districts of the city of Taez, the first day of a nationwide ceasefire, witnesses and medics said. (Photo by Ahmad Al-Basha/AFP Photo)
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