Soldiers stand on a tank of the Saudi-led coalition deployed on the outskirts of the southern Yemeni port city of Aden on August 3, 2015, during a military operation against Shiite Huthi rebels and their allies. Pro-government forces backed by a Saudi-led coalition retook Yemen’s biggest airbase from Iran-backed rebels in a significant new gain after their recapture of second city Aden last month. AFP PHOTO / SALEH AL-OBEIDI