Smoke billows following an air-strike by the Saudi-led coalition on an army arms depot, now under Shiite Huthi rebel control on May 22, 2015 east of the Yemeni capital Sanaa. The Saudi-led coalition has waged an air campaign against the Huthis since March 26 in an effort to restore the authority of Hadi, who has fled to Riyadh with members of his government. AFP PHOTO / MOHAMMED HUWAIS (Photo credit should read MOHAMMED HUWAIS/AFP/Getty Images)
