Mission Specialist Scott Parazynski acknowledges as he exits the Shuttle Training Aircraft after arrival at NASA's Kennedy Space Center.

STS-120 Mission Specialist Scott Parazynski acknowledges the welcome of nearby spectators as he exits the Shuttle Training Aircraft after arrival at NASA's Kennedy Space Center. Parazynski will be making his fifth shuttle flight on the mission. The crew has returned to Kennedy to prepare for launch aboard space shuttle Discovery at 11:38 a.m. EDT on Oct. 23. The mission will be the 23rd shuttle flight to the International Space Station, delivering the Italian-built U.S. Node 2, called Harmony. 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. Discovery is expected to complete its mission and return home at 4:47 a.m. EST on Nov. 6. Photo credit: NASA/Kim Shiflett