A view of the underside of space shuttle Discovery as it is lifted above the transfer aisle of the Vehicle Assembly Building.

A view of the underside of space shuttle Discovery as it is lifted above the transfer aisle of the Vehicle Assembly Building. Discovery will be moved into high bay 1 for mating with the external tank and solid rocket boosters waiting on the mobile launcher platform. Discovery is targeted for launch to the International Space Station for mission STS-120 on 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/Troy Cryder