The STS-120 crew enjoy a photo moment during a final daylight excursion to the launch pad the day before launch.

At NASA's Kennedy Space Center, the STS-120 crew enjoy a photo moment during a final daylight excursion to the launch pad the day before launch. From left are Mission Specialist Paolo Nespoli, Pilot George Zamka, Commander Pamela Melroy and Mission Specialists Stephanie Wilson, Daniel Tani, Doug Wheelock and Scott Parazynski. Nespoli represents the European Space Agency. Tani will be remaining on the International Space Station to join the Expedition 16 crew after the mission is complete. Liftoff of space shuttle Discovery is scheduled for 11:38 a.m. EDT Oct. 23. The mission will be the 23rd assembly flight to the International Space Station and the 34th flight for Discovery. Payload on the mission is the Italian-built U.S. Node 2, called Harmony. On 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