The seven STS-120 astronauts are due to fly into NASA's Kennedy Space Center in Florida on Sunday evening, in advance of next week's launch dress rehearsal activities. During the week, the astronauts and ground crews are scheduled to participate in various simulated countdown activities and training exercises.

Over the past week, space shuttle Discovery rolled out from the Vehicle Assembly Building to Launch Pad 39A, where the payload for its mission was installed in the shuttle's cargo bay. The payload includes the Italian-built U.S. Harmony module, which will be delivered to the International Space Station.

As the clock counts down to a crew change aboard the International Space Station and a visit by space shuttle Discovery, the Expedition 15 crew wrapped up a busy week of preparations.

Flight Engineer Clay Anderson installed the centerline camera in a hatch window in the Unity node Friday. The camera will serve as an alignment aid when astronauts use a robotic arm to guide the Harmony node into place. Harmony is being delivered to the station aboard space shuttle Discovery, set to launch Oct. 23.

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