NASA - National Aeronautics and Space Administration

Platforms are extended toward space shuttle Atlantis from the fixed service structure, at left, as processing begins following the shuttle's arrival at Launch Pad 39A. Photo credit: NASA/Kim Shiflett

Space shuttle Atlantis nears the top of the hardstand on its final approach to Launch Pad 39A. The rotating service structure, adjoined to the fixed service structure at left, has been rolled back for the shuttle's arrival. Photo credit: NASA/Kim Shiflett

Moving along at a top speed of one mile an hour, a crawler transporter carries space shuttle Atlantis past an American flag on the way to Launch Pad 39A. Photo credit: NASA/Kim Shiflett

The Vehicle Assembly Building is visible in the distance as a crawler transporter carries space shuttle Atlantis out to Launch Pad 39A in preparation for launch on the STS-122 mission. Photo credit: NASA/Kim Shiflett

Space shuttle Atlantis, 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. Photo credit: NASA/Kim Shiflett

Space shuttle Atlantis rides along the crawlerway toward Launch Pad 39A on a beautiful Florida morning just after sunrise. Photo credit: NASA/Kim Shiflett

Silhouetted against the rising sun, a crawler transporter carrying space shuttle Atlantis moves along the crawlerway from the Vehicle Assembly Building to Launch Pad 39A. Photo credit: NASA/Kim Shiflett