STS-125 MS3 Grunsfeld during EVA5

STS-125 Mission Specialist 3 (MS3) John Grunsfeld works to replace the Hubble Space Telescope's Support Systems Module (SSM) Equipment Section (ES) Bay 3 battery during the fifth session of Extravehicular Activity (EVA5). He is positioned on the Shuttle Remote Manipulator System (SRMS) Manipulator Foot Restraint (MFR).