US Air Force (USAF) personnel assigned to the 1ST Space Operations Squadron (SOPS), 50th Space Wing (SW), Schriever Air Force Base (AFB), Colorado, take home the award for the best Space Operations competitors in the Air Force Space Command (AFSPC) during the Closing Ceremony for Exercise GUARDIAN CHALLENGE 2002, at Vandenberg AFB, CA. Guardian Challenge, a four-day space and missile competition, is hosted annually at Vandenberg AFB, CA to test the wartime readiness of Air Force Space Command (AFSPC) professionals

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. US Air Force (USAF) personnel assigned to the 1ST Space Operations Squadron (SOPS), 50th Space Wing (SW), Schriever Air Force Base (AFB), Colorado, take home the award for the best Space Operations competitors in the Air Force Space Command (AFSPC) during the Closing Ceremony for Exercise GUARDIAN CHALLENGE 2002, at Vandenberg AFB, CA. Guardian Challenge, a four-day space and missile competition, is hosted annually at Vandenberg AFB, CA to test the wartime readiness of Air Force Space Command (AFSPC) professionals. 2002-05-09. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6629111. (Accessed September 26, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (2002-05-09) US Air Force (USAF) personnel assigned to the 1ST Space Operations Squadron (SOPS), 50th Space Wing (SW), Schriever Air Force Base (AFB), Colorado, take home the award for the best Space Operations competitors in the Air Force Space Command (AFSPC) during the Closing Ceremony for Exercise GUARDIAN CHALLENGE 2002, at Vandenberg AFB, CA. Guardian Challenge, a four-day space and missile competition, is hosted annually at Vandenberg AFB, CA to test the wartime readiness of Air Force Space Command (AFSPC) professionals. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6629111
MLA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/6629111>.
Note: These citations are programmatically generated and may be incomplete.