STS-125 Crew Members Pose for a Photo during Flight Day 7

Astronaut Megan McArthur, STS-125 mission specialist, poses for a photo with astronaut Mike Massimino, mission specialist, as he looks through an aft flight deck window of the Earth-orbiting Space Shuttle Atlantis during the mission's fourth session of extravehicular activity (EVA4) on the Hubble Space Telescope.