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SANAA, YEMEN - FEBRUARY 11: Yemeni people celebrate the 3rd anniversary of Yemeni revolution at Sittin square of Sanaa, Yemen, on February 11, 2014. Thousand members of Al-Islah Party, Revolution movement, and Yemeni Youth Movement attend the celebrations. (Photo by Ali Owidha/Anadolu Agency/Getty Images)

SANAA, YEMEN - FEBRUARY 11: Yemeni people celebrate the 3rd anniversary of Yemeni revolution at Sittin square of Sanaa, Yemen, on February 11, 2014. Thousand members of Al-Islah Party, Revolution movement, and Yemeni Youth Movement attend the celebrations. (Photo by Ali Owidha/Anadolu Agency/Getty Images)