Col. Jeremy Raley (left), Air Force Research Laboratory, Director of Space Vehicles Directorate, and Phillips Research Site commander, shakes hands with Lt. Col. David Johnson (right), Air Force Research Laboratory, Space Vehicles Directorate, outgoing materiel leader and chief, during an assumption of leadership ceremony at Kirtland Air Force Base, New Mexico, July 5, 2023. Johnson was in charge of 160 military, civilians and contractors in managing concept, ideation, assessment, acquisition, operation and transition activities. (U.S. Air Force photo by Airman 1st Class Spencer Kanar.)