July 2, 2025 Media Advisory: Space Launch Delta 30 to Host Change of Command at Vandenberg Space Force Base, July 8 U.S. Space Force Col. Mark A. Shoemaker will pass command of SLD 30, Vandenberg SFB’s host unit, to U.S. Space Force Col. James T. Horne III in a change-of-command ceremony, at the Vandenberg SFB Parade Grounds July 8 at 10 a.m.