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KENNEDY SPACE CENTER, FLA. -- Sigmar Wittig, head of the DLR, the German Space Agency; Bill Gerstenmaier, NASA associate administrator for Space Operations; Mike Griffin, NASA administrator; Michel Tognini, head of the European Astronaut Center; and Bill Parsons, Kennedy Space Center deputy director, examine the thermal protection system tiles beneath Space Shuttle Discovery following the landing of mission STS-116 on Runway 15 at NASA Kennedy Space Center's Shuttle Landing Facility. During the STS-116 mission, three spacewalks attached the P5 integrated truss structure to the station, and co…
