58. USAF KC-10 Extender Aircraft Refuels a USAF SR-71 Blackbird Aircraft During the Setting of the Sun, August 2, 1981, Beale Air Force Base, State of California, USA. Photo Credit: Staff Sgt. (SSGT) Bill Thompson, United States Air Force (USAF, http://www.af.mil); Defense Visual Information Center (DVIC, http://www.DoDMedia.osd.mil, DF-ST-83-03355) and United States Air Force (USAF, http://www.af.mil), United States Department of Defense (DoD, http://www.DefenseLink.mil or http://www.dod.gov), Government of the United States of America (USA).
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