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[[1979]] - Pluto moves inside Neptune's orbit for the first time since either was discovered. <br>[[1984]] - Space Shuttle program: STS-41-B Mission - Astronauts Bruce McCandless II and Robert L. Stewart make the first untethered space walk using the Manned Maneuvering Unit (MMU). <br>[[2007]] - The second "Berlin Patient" is given a stem cell transplant which cures his HIV/AIDS. <br> <noinclude>[[Category:On This Day|038]]</noinclude>