Visiting NASA Johnson Space Centre
| Start Date | Friday, January 25, 2008 |
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Per Wimmer Visiting NASA Johnson Space Centre, Houston, And Piers Sellers, British-American Astronaut on STS-112 Atlantis (Oct 7-18, 2002) performing three spacewalks (19 hours and 41 min of EVA); STS-121 Discovery (July 4-17, 2006; 7.5 hrs EVA).
