The United States depends on space assets to support national security activities as well as civil and commercial activities. The Department of Defense (DOD) depends on space assets to support a wide range of military missions to include intelligence collection; battlefield surveillance and management; global command, control, and communications; and navigation assistance. This operational dependence on space has placed new and increasing demands on current space systems and organizations to meet Joint Force Commanders’ needs. Moreover, concerns have increased regarding emerging threats that could affect the United States’ and other countries’ access to the free use of space.