Astronaut Bruce McCandless II, 41-B mission specialist, tests a mobile foot restraint (MFR) attached to the remote manipulator system (RMS). The aft portion of the Challenger, to which the RMS is connected, is seen in the lower left corner. The protective cradle that the WESTAR VI satellite used in the left corner of the frame. Below McCandless can be seen the cloudy surface of the earth (27037,27040); McCandless "rides" the RMS arm during a lengthy EVA. The 41-B mission specialist has his eyes on the shuttle pallet satellite (SPAS-01A) in the middle of the Challenger's cargo bay (27038); McCandless appears to be walking on cargo, but is realy being flown over it by the combination of MFR and RMS. His helmet visor reflects parts of the payload bay that can't be seen in the larger portion of the photo. Behind him can be seen both the orbital maneuvering system (OMS) pods (27039).
