Armed tribesmen, loyal to the Shiite Huthi rebels, brandish their weapons during a gathering in the capital Sanaa to mobilize more fighters to battlefronts to fight pro-government forces in several Yemeni cities, on June 20, 2016. The Shiite Huthi rebels and their allies overran the capital Sanaa in September 2014 and went on to seize control of several regions, forcing President Abedrabbo Mansour Hadi to flee to Saudi Arabia. / AFP / MOHAMMED HUWAIS (Photo credit should read MOHAMMED HUWAIS/AFP/Getty Images)
