TO GO WITH AFP STORY BY IAN TIMBERLAKE A picture taken on November 16, 2015 shows a Saudi F-15 fighter jet landing at the Khamis Mushayt military airbase, some 880 km from the capital Riyadh, as the Saudi army conducts operations over Yemen. AFP PHOTO / FAYEZ NURELDINE === PHOTO TAKEN DURING A GUIDED MILITARY TOUR === / AFP PHOTO / FAYEZ NURELDINE