Bruce Murray Space Image Library

Mike Massimino on a spacewalk, May 17, 2009

Mike Massimino on a spacewalk, May 17, 2009
Mike Massimino on a spacewalk, May 17, 2009 Astronaut Mike Massimino, STS-125 mission specialist, is photographed from an aft flight deck window of the Space Shuttle Atlantis during the mission's fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. NASA

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