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KENNEDY SPACE CENTER, FLA. -- The STS-120 crew members wave to spectators as they head for the Astrovan that will take them to Launch Pad 39A at NASA's Kennedy Space Center. Leading the way at right is Commander Pamela Melroy. Behind her, from right, are Pilot George Zamka, and Mission Specialists Doug Wheelock, Stephanie Wilson, Daniel Tani, Scott Parazynski and Paolo Nespoli, who represents the European Space Agency. Tani will remain on the International Space Station to join the Expedition 16 crew after the mission is complete. Discovery is scheduled for liftoff at 11:38 a.m. EDT. The mission will be the 23rd assembly flight to the space station and the 34th flight for Discovery. Payload on the mission is the Italian-built U.S. Node 2, called Harmony. During the 14-day mission, the crew will install Harmony and move the P6 solar arrays to their permanent position and deploy them. Discovery is expected to complete its mission and return home at 4:47 a.m. EST on Nov. 6. Photo credit: NASA/Kim Shiflett