Mohammed bin Salman, the Saudi crown prince, during a Saudi investment event at the Kennedy Center in Washington, Nov. 19, 2025. The attacks by the Houthis have struck at the heart of Crown Prince Mohammed bin Salman’s plans to turn Riyadh into a global travel and business hub. (Haiyun Jiang/The New York Times) By VIVIAN NEREIM and EUAN WARD The Iran-backed Houthi militia launched a deadly attack on an international airport in Saudi Arabia’s capital on Saturday that Saudi officials said…