Workers at NASA's Kennedy Space Center move the rotating service structure into place on Launch Pad 39A.

Workers at NASA's Kennedy Space Center in Florida move the rotating service structure into place around space shuttle Discovery on Launch Pad 39A. 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