US Air Force (USAF) Security Police (SP) assigned to the 310th Space Group (SG) "Bombardiers" armed with 5.56mm M16A2 rifles carry a practice dummy during a simulated prisoner of war exercise at Vandenberg Air Force Base (AFB) California (CA), during Exercise GUARDIAN CHALLENGE 2002. 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) Security Police (SP) assigned to the 310th Space Group (SG) "Bombardiers" armed with 5.56mm M16A2 rifles carry a practice dummy during a simulated prisoner of war exercise at Vandenberg Air Force Base (AFB) California (CA), during Exercise GUARDIAN CHALLENGE 2002. 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. 2002-05-06. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6629021. (Accessed July 20, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-, (2002-05-06) US Air Force (USAF) Security Police (SP) assigned to the 310th Space Group (SG) "Bombardiers" armed with 5.56mm M16A2 rifles carry a practice dummy during a simulated prisoner of war exercise at Vandenberg Air Force Base (AFB) California (CA), during Exercise GUARDIAN CHALLENGE 2002. 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/6629021
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/6629021>.
Note: These citations are programmatically generated and may be incomplete.