STS-120 Commander Pamela Melroy adjusts before heading to Launch Pad 39A for launch aboard Discovery to the International Space Station.

At NASA's Kennedy Space Center, STS-120 Commander Pamela Melroy adjusts the gloves on her launch and entry suit before heading to Launch Pad 39A for launch aboard space shuttle Discovery to the International Space Station. 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