Welcome to Peterson Air Force Base, home of the 21st Space Wing, the Air Force's only organization responsible for worldwide missile warning and space control. The men and women of the 21st Space Wing, Team 21, work throughout the Colorado Springs area in what is known as the Peterson Complex—Peterson Air Force Base, Schriever Air Force Base and Cheyenne Mountain Air Station—as well 25 locations in 9 countries around the globe. In addition to their operational missions, Team 21 serves as host unit of the Peterson Complex for four major military headquarters—North American Aerospace Defense Command, U.S. Space Command, Air Force Space Command and Army Space Command—as well as the 302nd Airlift Wing (Reserve) and many tenant units from other major commands.
 

The 21st SW provides missile warning and space control to North American Aerospace Defense and U.S. Strategic Command through a network of command and control units and ground and space–based sensors operated by geographically separated units around the world.

As host wing for the Peterson Complex, the 21 SW's 21st Maintenance Group and the 21st Mission Support Group provide complete logistical and base support services for Peterson AFB and Cheyenne Mountain AFS, and certain logistics and support functions for Schriever AFB, Colo.

Through these units and the 810th Medical Operations Squadron, the wing also helps meet the medical, housing, educational, recreational and family support needs of assigned people, local retirees and their families. It also provides such services as personnel, security, civil engineering, communications and computer support, finance, contracting, transportation, flightline services, supply and maintenance.

The wing's 721st Support Group is responsible for the upkeep and maintenance of facilities and equipment in Cheyenne Mountain AS. This responsibility requires civil engineering, computer and communications and security support. It makes sure the space operators are able to continue with their mission.