Stock Photo - Astronaut Peggy Whitson, Expedition 16 commander, looks over a checklist in the Zvezda Service Module of the International Space Station while Space Shuttle Endeavour (STS-123) is docked with the station.

Stock Photo: Astronaut Peggy Whitson, Expedition 16 commander, looks over a checklist in the Zvezda Service Module of the International Space Station while Space Shuttle.