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August 19, 2011
Space Shuttle Discovery, with commander Steven W. Lindsey at the helm, approaches runway 15 at Kennedy Space Center's Shuttle Landing Facility at 9:14 a.m. (EDT) on July 17, 2006. Also onboard were astronauts Mark E. Kelly, pilot; Piers J. Sellers, Michael E. Fossum, Lisa M. Nowak and Stephanie D. Wilson, all mission specialists. During the nearly 13-day mission, the STS-121 crew tested new equipment and procedures to improve shuttle safety, and delivered supplies and made repairs to the International Space Station.

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