Linear Aerospike SR-71 Experiment (LASRE) at NASA's Dryden Flight Research Center, Edwards, CA on March 4, 1998 (1041×832)

More info: https://www.nasa.gov/centers/dryden/multimedia/imagegallery/SR-71-LASRE/EC98-44440-4.html https://www.nasa.gov/centers/dryden/multimedia/imagegallery/SR-71-LASRE/SR-71-LASRE_proj_desc.html [pdf] - https://pdfs.semanticscholar.org/30b2/37015794e1912a8ea18171366f13a9659382.pdf