STS-125 MS5 Feustel and MS3 Grunsfeld during EVA3

STS-125 Mission Specialist 5 (MS5) Andrew Feustel, positioned on the Manipulator Foot Restraint (MFR), moves the Hubble Space Telescope (HST) Corrective Optics Space Telescope Axial Replacement (COSTAR) during the third session of extravehicular activity (EVA3). MS3 John Grunsfeld is visible working behind the HST -V2 door.