Stock Photo - European Space Agency astronauts Frank De Winne (left), Expedition 20 flight engineer; and Christer Fuglesang, STS-128 mission specialist, work at the Harmony node's nadir hatch of the International Space Station while Space Shuttle Discovery remains docked with the station.

Stock Photo: European Space Agency astronauts Frank De Winne (left), Expedition 20 flight engineer; and Christer Fuglesang, STS-128 mission specialist.

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