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June 3, 2011
Astronaut Steven A. Hawley, mission specialist, controls Discovery's remote manipulation system (RMS), from the aft flight deck. Hawley and his crew mates are preparing for a scheduled rendezvous with the Hubble Space Telescope (HST), which will be pulled into Discovery's cargo bay with the aid of the RMS. A series of spacewalks will be required to properly service the giant telescope. Hawley served as a mission specialist on NASA's 1990 mission which was responsible for placing HST in Earth orbit.