KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery moves along the crawlerway from the Vehicle Assembly Building toward Launch Pad 39A as the sun rises on a balmy Florida morning. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery begins moving through the doors of the Vehicle Assembly Building toward Launch Pad 39A. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery, atop a mobile launch platform, moves through the doors of the Vehicle Assembly Building toward Launch Pad 39A just before sunrise on a balmy Florida morning. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Workers monitor the progress of Space Shuttle Discovery as it moves through the doors of the Vehicle Assembly Building toward Launch Pad 39A. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery Flow Director Stephanie Stilson poses with the orbiter in the background as it is moved from the Vehicle Assembly Building to Launch Pad 39A. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- A crawler transporter moves Space Shuttle Discovery, secured atop a mobile launch platform, along the crawlerway from the Vehicle Assembly Building to Launch Pad 39A on a balmy Florida morning. First motion out of the VAB was at 6:47 a.m. EDT. The crawler transporter, mobile launch platform and unfueled space shuttle weigh a total of approximately 17.5 million pounds. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery, atop a mobile launch platform, climbs the five percent grad to the top of the hardstand at Launch Pad 39A. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery climbs the five percent grade to the top of the hardstand at Launch Pad 39A. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The crawler transporter, moving Space Shuttle Discovery atop its mobile launch platform from the Vehicle Assembly Building, heads in the direction of Launch Pad 39A. The journey has reached the intersection in the crawlerway of the paths to Pad 39A and Pad 39B. First motion out of the VAB was at 6:47 a.m. EDT. The crawler transporter, mobile launch platform and unfueled space shuttle weigh a total of approximately 17.5 million pounds. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Access platforms at Launch Pad 39A are moved into position against Space Shuttle Discovery atop a mobile launch platform. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The crawler transporter, moving Space Shuttle Discovery atop its mobile launch platform from the Vehicle Assembly Building, follows the path to Launch Pad 39A. The journey has reached the intersection in the crawlerway of the roads to Pad 39A and Pad 39B. First motion out of the VAB was at 6:47 a.m. EDT. The crawler transporter, mobile launch platform and unfueled space shuttle weigh a total of approximately 17.5 million pounds. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery moves along the crawlerway near the turn basin in Launch Complex 39 toward Pad A as the sun rises on a balmy Florida morning. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Access platforms at Launch Pad 39A are moved into position against Space Shuttle Discovery on a balmy Florida afternoon. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- A rainbow can be seen in the spray from the water truck traveling ahead of Space Shuttle Discovery on its move from the Vehicle Assembly Building to Launch Pad 39A. First motion out of the VAB was at 6:47 a.m. EDT. The water dampens the rocks on the crawlerway, reducing the amount of dust churned up by the passage of the shuttle. The crawler transporter carrying the mobile launch platform and unfueled space shuttle weighs approximately 17.5 million pounds. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery, atop a mobile launch platform, passes by the turn basin in Launch Complex 39 toward Pad A as the sun rises on a balmy Florida morning. First motion out of the VAB was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery approaches Launch Pad 39A. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery has arrived at Launch Pad 39A. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- A banner at Launch Pad 39A proclaims the sentiments of the work force at Kennedy Space Center following the arrival of Space Shuttle Discovery on a balmy Florida afternoon. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery, atop a mobile launch platform, climbs the five percent grad to the top of the hardstand at Launch Pad 39A. At right, the pad's fixed and mobile service structures are in position to receive it. Discovery arrived at its seaside launch pad around noon and was hard down at 1:15 p.m. First motion out of the Vehicle Assembly Building was at 6:47 a.m. EDT. Rollout is a milestone for Discovery's launch to the International Space Station on mission STS-120, targeted for Oct. 23. The crew will be delivering and installing the Italian-built U.S. Node 2, named Harmony. The pressurized module will act as an internal connecting port and passageway to additional international science labs and cargo spacecraft. In addition to increasing the living and working space inside the station, it also will serve as a work platform outside for the station's robotic arm. Photo credit: NASA/George Shelton