Commanders and advisors from Iran’s elite Islamic Revolutionary Guard Corps are on the ground in Yemen and playing a direct role in Houthi rebel attacks on commercial traffic in the Red Sea. The IRGC has stationed missile and drone trainers and operators in Yemen, as well as personnel providing tactical intelligence support to the Houthis, U.S. and Middle East officials told Semafor. The IRGC, through its overseas Qods Force, has also overseen the transfer to the Houthis of the attack drones, cruise missiles, and medium-range ballistic missiles used in a string of strikes on Red Sea and Israeli targets in...