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Extravehicular Activity (EVA) 4 on Flight Day 7 to service the Hubble Space Telescope (HST) on this second servicing mission (HST SM-02). Extravehicular Mobility Unit (EMU) suited astronauts Greg Harbaugh and Joe Tanner attach Multilayer Insulation (MLI) patches over cracked insulation on the telescope. Harbaugh (identified by the broken red stripes) stands on the Remote Manipulator System (RMS) Manipulator Foot Restraint (MFR) while Smith holds onto the MFR stanchion and holds the Closed Circuit Television (CCT) camera over Harbaugh shoulder while he works. Distant view of mostly the top of the telescope backdropped by the Earth (001-3, 016-18, 025-27). Wide shot of the payload bay from the external airlock and the entire Hubble Space Telescope (004-6, 013-15, 019-24). Closeup of the two EVA astronauts near the top of the telescope (007-12, 028-36).