John F. Plumb, Ph.D., the first Assistant Secretary of Defense for Space Policy, signs the Joint Task Force-Space Defense’s board during his visit to the organization at Schriever Space Force Base, Colo., June 29, 2022. Dr. Plumb met with leaders from the JTF-SD to discuss its mission to protect and defend the space domain. JTF-SD, in unified action with mission partners, deters aggression, defends capabilities, and defeats adversaries throughout the continuum of conflict. (U.S. Space Force photo by Tiana Williams)