The Air Force Space Command was formed in September 1982 initially responsible for space monitoring and space-related activities connected with the defense of the United States and Canada. In 1993 the ICBM force passed from the Air Combat Command to the Space Command and since then AFSPC has been responsible for the ICBM nuclear deterrent force, the early warning of ballistic missile launches, the launch and operation of military satellites (including the GPS constellation) and worldwide space surveillance.
But the only manned aircraft assigned to the Air Force Space Command are approximately 26 Bell UH-1Ns assigned to three Flights to fly launch crews to ICBM missile silos and transport security teams to ICBM sites. The three Flights are based at three Air Force bases of the 20th Air Force, the operating AF for the ICBM force- Francis E. Warren AFB, Wyoming (tail code "FE"), Minot AFB, North Dakota ("MT"), and Malmstrom AFB, Montana ("MT"). A fourth Flight of UH-1s is based at Vandenberg AFB ("HV") to support missile and space launch activities.
Source: US Air Force: The New Century by Bob Archer. Midland Publishing, 2000, p29.