SR-71A and F-15B at SunsetThe SR-71A #844 and F-15B #837 under a beautiful August sunset. Used as a high-speed, high-altitude test bed, 844 was retired in 1997. With a combined history of 35 years of flight test, 837 was retired in 2009.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/sr-71a-f-15b-sunset/Copy URL to clipboard> DownloadShareSize1041x782px