S125-E-007397 (14 May 2009) --- Astronaut Andrew Feustel, perched alone on the end of the Space Shuttle Atlantis? remote manipulator system arm, participates in the first of five STS-125 spacewalks to perform work on the Hubble Space Telescope, temporarily locked down in the cargo bay of the Earth-orbiting shuttle. Out of frame is his space-walking colleague, veteran astronaut John Grunsfeld. The two mission specialists are also assigned to two of the remaining four sessions of extravehicular activity for the Atlantis crew.