Astronaut Bruce McCandless II, STS-41B mission specialist, tests a Mobile Foot Restraint (MFR) attached to the Remote Manipulator System (RMS) aboard the Space Shuttle Challenger. [3000 x 3000] via /r/spaceporn http://bit.ly/2N5IEA6
via Tumblr http://bit.ly/2X0RW4L
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