Within hours of announcing the end of its military campaign against Houthi rebels in Yemen, Saudi-led coalition planes bombed the city of Taiz. Fighting is also continuing in the port city of Aden. All this comes despite Riyadh declaring that its month-long campaign, which sought to restore the country's president, had achieved its goals. But the surprise statement raises more questions than answers, since the deposed leader has not resumed his role as the country's number one.