Stock Photo - After suiting up, the STS-120 crewmembers exit the Operations and Checkout Building to board the Astrovan, which will take them to launch pad 39A at Kennedy Space Center. From the right are astronauts Pam Melroy, commander; George Zamka, pilot; Doug Wheelock, Stephanie Wilson, Daniel Tani, Scott Parazynski and European Space Agency's (ESA) Paolo Nespoli, all mission specialists. Discovery will link up with the International Space Station on Thursday, Oct. 25, to begin a joint mission to continue construction by delivering 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.