Bridget Toomey and Bill Roggio report Houthi rebels have initiated a maritime blockade against Saudi Arabian ports, causing ship traffic through the Bab el-Mandeb strait to fall to its lowest level in months. While the Houthis cite local grievances, their actions align with Iran's broader strategy to pressure global energy markets. Despite the threat, Saudi Arabia has retaliated by bombing Houthi ports, even as the rebels receive targeting assistance from Iranian spy ships. (4)