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KENNEDY SPACE CENTER, FLA. -- Representatives of NASA's international partners participate in a news briefing on the launch readiness of space shuttle mission STS-120. From left are George Diller, briefing moderator for NASA; Alan Thirkettle, International Space Station Program Manager for ESA, the European Space Agency; and Mauro Piermaria, ESPERIA mission manager for ASI, the Italian Space Agency. The STS-120 mission will be the 23rd shuttle flight to the International Space Station, delivering the Italian-built U.S. Node 2, called Harmony. The seven-member crew includes ESA astronaut Paolo Nespoli from Italy. The 14-day mission includes five spacewalks -- four by shuttle crew members and one by the station's Expedition 16 crew -- to install Harmony and move the P6 solar arrays to their permanent position and deploy them. Launch aboard space shuttle Discovery is planned for 11:38 a.m. EDT Oct. 23, and Discovery is scheduled to complete its mission and return home on Nov. 6. Photo credit: NASA/George Shelton