STS-125 MS3 Grunsfeld during EVA1

S125-E-007207 (14 May 2009) --- Astronaut John Grunsfeld, STS-125 mission specialist, participates in the first of his crew's five scheduled spacewalks in five consecutive days to perform the final hands-on servicing of the Hubble Space Telescope. Grunsfeld and his crewmate, astronaut Andrew Feustel, are slated for three of the five sessions.