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STS109-E-5420 (7 March 2002) --- Flight Day 7 of the STS-109 mission finds astronaut Richard M. Linnehan, mission specialist, back in the shirt-sleeve environment of the Space Shuttle Columbia, just like his space walking partner--astronaut John M. Grunsfeld (out of frame). Two of Grunsfeld's crewmates were about to begin the fourth space walk of the mission to perform special tasks on the Hubble Space Telescope (HST). Linnehan and Grunsfeld will participate in the fifth and final scheduled spacewalk in a little more than 24 hours. It will mark their third shared space walk for the current …
