KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, the mission STS-120 crew members are getting familiar with the Node 2, another element to be added to the International Space Station. Seen here is Mission Specialist Douglas H. Wheelock, handling some of the equipment on the module. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In In the Space Station Processing Facility, STS-120 Commander Pamela Melroy (center) learns more about the Node 2, another element to be added to the International Space Station. With her is astronaut Peggy Whitson, who served on Expedition 5 aboard the space station. During her 6-month stay aboard the space station, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment. Melroy and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Daniel Tani (left) examines equipment for the Node 2, another element to be added to the International Space Station. Looking on, at right, is astronaut Peggy Whitson, who served on Expedition 5 aboard the space station. During her 6-month stay aboard the space station, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment. Tani and other crew members are at KSC for equipment familiarization. Tani will be joining the Expedition 15 crew on the space station as flight engineer. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Daniel Tani (left) and Commander Pamela Melroy learn some details about the Node 2, another element to be added to the International Space Station. With them, at right, is astronaut Peggy Whitson, who served on Expedition 5 aboard the space station. During her 6-month stay aboard the space station, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment. Tani, Melroy and other crew members are at KSC for equipment familiarization. Tani will be joining the Expedition 15 crew on the space station as flight engineer. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialists Scott Parazynski (left), Paolo Angelo Nespoli (center) and Douglas H. Wheelock practice using some of the equipment for the Node 2, another element to be added to the International Space Station. They and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, the mission STS-120 crew members are getting familiar with the Node 2, another element to be added to the International Space Station. Seen here are Mission Specialists Paolo Angelo Nespoli (left) and Douglas H. Wheelock. Nespoli represents the European Space Agency. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Daniel Tani (gesturing) explains to Scott Parazynski (center) and astronaut Peggy Whitson what he has learned about the Node 2, another element to be added to the International Space Station. Whitson served on Expedition 5 aboard the space station. Tani and other crew members are at KSC for equipment familiarization. Tani will be joining the Expedition 15 crew on the space station as flight engineer. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Scott Parazynski becomes familiar with the Node 2, another element to be added to the International Space Station. He and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Scott Parazynski becomes familiar with the Node 2, another element to be added to the International Space Station. He and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Daniel Tani (center) learns more about the Node 2, another element to be added to the International Space Station. With him, at right, is astronaut Peggy Whitson, who served on Expedition 5 aboard the space station. During her 6-month stay aboard the space station, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment.. He and other crew members are at KSC for equipment familiarization. Tani will be joining the Expedition 15 crew on the space station as flight engineer. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In In the Space Station Processing Facility, STS-120 Commander Pamela Melroy (center) learns more about the Node 2, another element to be added to the International Space Station. She and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Commander Pamela Melroy (right) learns more about the Node 2, another element to be added to the International Space Station. With her is astronaut Peggy Whitson, who served on Expedition 5 aboard the space station. During her 6-month stay aboard the space station, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment. She and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Daniel Tani (left) examines equipment for the Node 2, another element to be added to the International Space Station. Looking on, at right, is astronaut Peggy Whitson, who served on Expedition 5 aboard the space station. During her 6-month stay aboard the space station, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment. Tani and other crew members are at KSC for equipment familiarization. Tani will be joining the Expedition 15 crew on the space station as flight engineer. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialist Daniel Tani (center) talks about his mission and the Node 2, another element to be added to the International Space Station with astronaut Peggy Whitson, at right. Whitson served on Expedition 5 aboard the space station. During her 6-month stay, Dr. Whitson installed the Mobile Base System, the S1 truss segment, and the P1 truss segment. He and other crew members are at KSC for equipment familiarization. Tani will be joining the Expedition 15 crew on the space station as flight engineer. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, the mission STS-120 crew members are getting familiar with the Node 2, another element to be added to the International Space Station. Seen here is Mission Specialist Douglas H. Wheelock. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Space Station Processing Facility, STS-120 Mission Specialists Paolo Angelo Nespoli (left) and Douglas H. Wheelock practice using some of the equipment for the Node 2, another element to be added to the International Space Station. They and other crew members are at KSC for equipment familiarization. Node 2 will provide a passageway between three station science experiment facilities: the U.S. Destiny Laboratory, the Kibo Japanese Experiment Module, and the European Columbus Laboratory. STS-120 is targeted for launch on October 20. Photo credit: NASA/Kim Shiflett