STS-125 Crew Member poses for a photo on the Middeck prior to EVA4

S125-E-009376 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, peers through an opening of his Extravehicular Mobility Unit (EMU) spacesuit on the Earth-orbiting Space Shuttle Atlantis prior to donning it in preparation for the mission?s fourth session of extravehicular activity.