VANDENBERG SPACE FORCE BASE, Calif. -- During a Space Launch Delta 30 Change of Command ceremony, U.S. Space Force Col. Mark Shoemaker, SLD 30 outgoing commander, was succeeded by U.S. Space Force Col. James T. Horne III, SLD 30 incoming commander at Vandenberg Space Force Base, Calif., July 8, 2025. The presiding officer, U.S. Space Force Lt. Gen. Philip Garrant, Space Systems Command commander, welcomed Horne as the new commander and highlighted some of Shoemaker's achievements during his time leading SLD 30.