Discovery stands tall on Launch Pad 39A as space center workers prepare to move the rotating service structure into place.

Space shuttle Discovery stands tall on Launch Pad 39A at NASA's Kennedy Space Center in Florida as space center workers prepare to move the rotating service structure into place. The structure protects the shuttle from the elements and allows access into the spacecraft while on the pad.

Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the International Space Station on the STS-133 mission. Photo credit: NASA/Dimitri Gerondidakis