Two months after ascending to the throne, King Salman of Saudi Arabia bet his prestige as a new leader on rallying his Arab allies for a military campaign to save Yemen from an Iranian takeover — all under the direction of his son, the new defense minister and chief of the royal court. The results a week later showed just how big a risk they took. The Houthis, portrayed as Iranian proxies by the Saudis but few others, have continued their advances despite nine nights of Saudi-led airstrikes. On Thursday, Houthi fighters captured a presidential palace in the southern port of Aden, killed a Saudi soldier in a skirmish at the border and wounded five others. Islamist militants, meanwhile, capitalized on the chaos caused by the airstrikes to free […]