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August 19, 2011
Dr. Michael Griffin (right), NASA Administrator, talks with STS-121 crew members (L to R) Michael E. Fossum, mission specialist; Mark E. Kelly, pilot; Lisa M. Nowak, mission specialist; and Steven W. Lindsey, commander, after the landing of the Space Shuttle Discovery and conclusion of mission STS-121. The crew of seven tested new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station.

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