Forty years ago, @NASAAstronauts aboard shuttle Challenger performed the first untethered spacewalk...and a picture was taken that continues to resonate to this very day.
The post “Buck and Flash”: Remembering the First Flights of the Manned Maneuvering Unit (MMU), Forty Years On first appeared on AmericaSpace.
from AmericaSpace https://ift.tt/Om6XN8p
via World Space Info
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