SANAA, YEMEN - APRIL 19: Houthi militant stand guard after airstrikes as a part of the 'Decisive Storm' operation carried out by Saudi-led coalition against Houthi militants, in Faj Attan region of Sanaa, Yemen on April 19, 2015. Yemeni people leave their homes due to ongoing attacks. (Photo by Mohammed Hamoud/Anadolu Agency/Getty Images)
