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SR-71 pilots famously wore orange pressure suits, but as far as I have been able to find, the pressure suits worn by the M-21 flight crews were either silver, much like the suits worn by the Mercury Astronauts or white.
CSS&SB Pullman built 21 under Randolph Street in Chicago, Illinois on an unknown day in March 1980, Ektachrome by Chuck Zeiler. Just to the east of the station platforms was a couple of tracks that ran under Randolph Street and the Prudential Building which the South Shore used for storage.
Blackbird variants still hold numerous speed records, but the D-21 drone actually outpaced it, being capable of speeds of Mach 3.3 and altitudes up to 29 km. It could autonomously fly a preprogrammed course, using stellar navigation. After leaving hostile territory, it would drop a pod with the exposed film, for recovery, and would then self-destruct.
La Toba Guadalajara , Castilla la Mancha / Spain
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