Yemenis look at the damage following an air-strike by the Saudi-led coalition on the capital Sanaa on August 31, 2015. The Saudi-led coalition, which mounted an air campaign against Iran-backed rebels late March in support of exiled President Abedrabbo Mansour Hadi, has imposed a blockade on areas controlled by insurgents. AFP PHOTO / MOHAMMED HUWAIS        (Photo credit should read MOHAMMED HUWAIS/AFP/Getty Images)